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Understanding Multivariable Calculus: Problems, Solutions, and Tips

Understanding Multivariable Calculus: Problems, Solutions, and Tips

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Understanding Multivariable Calculus: Problems, Solutions, and Tips

Course No. 1023
Professor Bruce H. Edwards, Ph.D.
University of Florida
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5 out of 5
25 Reviews
92% of reviewers would recommend this series
Course No. 1023
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Course Overview

Calculus offers some of the most astounding advances in all of mathematics—reaching far beyond the two-dimensional applications learned in first-year calculus. We do not live on a sheet of paper, and in order to understand and solve rich, real-world problems of more than one variable, we need multivariable calculus, where the full depth and power of calculus is revealed.

Whether calculating the volume of odd-shaped objects, predicting the outcome of a large number of trials in statistics, or even predicting the weather, we depend in myriad ways on calculus in three dimensions. Once we grasp the fundamentals of multivariable calculus, we see how these concepts unfold into new laws, entire new fields of physics, and new ways of approaching once-impossible problems.

With multivariable calculus, we get

  • new tools for optimization, taking into account as many variables as needed;
  • vector fields that give us a peek into the workings of fluids, from hydraulic pistons to ocean currents and the weather;
  • new coordinate systems that enable us to solve integrals whose solutions in Cartesian coordinates may be difficult to work with; and
  • mathematical definitions of planes and surfaces in space, from which entire fields of mathematics such as topology and differential geometry arise.

Understanding Multivariable Calculus: Problems, Solutions, and Tips, taught by award-winning Professor Bruce H. Edwards of the University of Florida, brings the basic concepts of calculus together in a much deeper and more powerful way. This course is the next step for students and professionals to expand their knowledge for work or study in many quantitative fields, as well as an eye-opening intellectual exercise for teachers, retired professionals, and anyone else who wants to understand the amazing applications of 3-D calculus.

Designed for anyone familiar with basic calculus, Understanding Multivariable Calculus follows, but does not essentially require knowledge of, Calculus II. The few topics introduced in Calculus II that do carry over, such as vector calculus, are here briefly reintroduced, but with a new emphasis on three dimensions.

Your main focus throughout the 36 comprehensive lectures is on deepening and generalizing fundamental tools of integration and differentiation to functions of more than one variable. Under the expert guidance of Professor Edwards, you’ll embark on an exhilarating journey through the concepts of multivariable calculus, enlivened with real-world examples and beautiful animated graphics that lift calculus out of the textbook and into our three-dimensional world.

A New Look at Old Problems

How do you integrate over a region of the xy plane that can’t be defined by just one standard y = f(x) function? Multivariable calculus is full of hidden surprises, containing the answers to many such questions. In Understanding Multivariable Calculus, Professor Edwards unveils powerful new tools in every lecture to solve old problems in a few steps, turn impossible integrals into simple ones, and yield exact answers where even calculators can only approximate.

With these new tools, you will be able to

  • integrate volumes and surface areas directly with double and triple integrals;
  • define easily differentiable parametric equations for a function using vectors; and
  • utilize polar, cylindrical, and spherical coordinates to evaluate double and triple integrals whose solutions are difficult in standard Cartesian coordinates.

Professor Edwards leads you through these new techniques with a clarity and enthusiasm for the subject that make even the most challenging material accessible and enjoyable. With graphics animated with state-of-the-art software that brings three-dimensional surfaces and volumes to life, as well as an accompanying illustrated workbook, this course will provide anyone who is intrigued about math a chance to better understand the full potential of one of the crowning mathematical achievements of humankind.

About Your Professor

Dr. Bruce H. Edwards is Professor of Mathematics at the University of Florida. He earned his Ph.D. in Mathematics from Dartmouth College. He has been honored with numerous Teacher of the Year awards as well as awards for his work in mathematics education for the state of Florida.

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36 lectures
 |  30 minutes each
  • 1
    A Visual Introduction to 3-D Calculus
    Review key concepts from basic calculus, then immediately jump into three dimensions with a brief overview of what you’ll be learning. Apply distance and midpoint formulas to three-dimensional objects in your very first of many extrapolations from two-dimensional to multidimensional calculus, and observe some of the new curiosities unique to functions of more than one variable. x
  • 2
    Functions of Several Variables
    What makes a function “multivariable?” Begin with definitions, and then see how these new functions behave as you apply familiar concepts of minimum and maximum values. Use graphics and other tools to observe their interactions with the xy-plane, and discover how simple functions such as y=x are interpreted differently in three-dimensional space. x
  • 3
    Limits, Continuity, and Partial Derivatives
    Apply fundamental definitions of calculus to multivariable functions, starting with their limits. See how these limits become complicated as you approach them, no longer just from the left or right, but from any direction and along any path. Use this to derive the definition of a versatile new tool: the partial derivative. x
  • 4
    Partial Derivatives—One Variable at a Time
    Deep in the realm of partial derivatives, you’ll discover the new dimensions of second partial derivatives: differentiate either twice with respect to x or y, or with respect once each to x and y. Consider Laplace’s equation to see what makes a function “harmonic.” x
  • 5
    Total Differentials and Chain Rules
    Complete your introduction to partial derivatives as you combine the differential and chain rule from elementary calculus and learn how to generalize them to functions of more than one variable. See how the so-called total differential can be used to approximate ?z over small intervals without calculating the exact values. x
  • 6
    Extrema of Functions of Two Variables
    The ability to find extreme values for optimization is one of the most powerful consequences of differentiation. Begin by defining the Extreme Value theorem for multivariable functions and use it to identify relative extrema using a “second partials test”—which you may recognize as a logical extension of the “second derivative test” used in Calculus I. x
  • 7
    Applications to Optimization Problems
    Continue the exploration of multivariable optimization by using the Extreme Value theorem on closed and bounded regions. Find absolute minimum and maximum values across bounded regions of a function, and apply these concepts to a real-world problem: attempting to minimize the cost of a water line’s construction. x
  • 8
    Linear Models and Least Squares Regression
    Apply techniques of optimization to curve-fitting as you explore an essential statistical tool yielded by multivariable calculus. Begin with the Least Squares Regression Line that yields the best fit to a set of points. Then, apply it to a real-life problem by using regression to approximate the annual change of a man’s systolic blood pressure. x
  • 9
    Vectors and the Dot Product in Space
    Begin your study of vectors in three-dimensional space as you extrapolate vector notation and formulas for magnitude from the familiar equations for two dimensions. Then, equip yourself with an essential new means of notation as you learn to derive the parametric equations of a line parallel to a direction vector. x
  • 10
    The Cross Product of Two Vectors in Space
    Take the cross product of two vectors by finding the determinant of a 3x3 matrix, yielding a third vector perpendicular to both. Explore the properties of this new vector using intuitive geometric examples. Then, combine it with the dot product from Lecture 9 to define the triple scalar product, and use it to evaluate the volume of a parallelepiped. x
  • 11
    Lines and Planes in Space
    Turn fully to lines and entire planes in three-dimensional space. Begin by defining a plane using the tools you’ve acquired so far, then learn about projections of one vector onto another. Find the angle between two planes, then use vector projections to find the distance between a point and a plane. x
  • 12
    Curved Surfaces in Space
    Beginning with the equation of a sphere, apply what you’ve learned to curved surfaces by generating cylinders, ellipsoids, and other so-called quadric surfaces. Discover the recognizable parabolas and other 2D shapes that lay hidden in new vector equations, and observe surfaces of revolution in three-dimensional space. x
  • 13
    Vector-Valued Functions in Space
    Consolidate your mastery of space by defining vector-valued functions and their derivatives, along with various formulas relating to arc length. Immediately apply these definitions to position, velocity, and acceleration vectors, and differentiate them using a surprisingly simple method that makes vectors one of the most formidable tools in multivariable calculus. x
  • 14
    Kepler’s Laws—The Calculus of Orbits
    Blast off into orbit to examine Johannes Kepler’s laws of planetary motion. Then apply vector-valued functions to Newton’s second law of motion and his law of gravitation, and see how Newton was able to take laws Kepler had derived from observation and prove them using calculus. x
  • 15
    Directional Derivatives and Gradients
    Continue to build on your knowledge of multivariable differentiation with gradient vectors and use them to determine directional derivatives. Discover a unique property of the gradient vector and its relationships with level curves and surfaces that will make it indispensable in evaluating relationships between surfaces in upcoming lectures. x
  • 16
    Tangent Planes and Normal Vectors to a Surface
    Utilize the gradient to find normal vectors to a surface, and see how these vectors interplay with standard functions to determine the tangent plane to a surface at a given point. Start with tangent planes to level surfaces, and see how your result compares with the error formula from the total differential. x
  • 17
    Lagrange Multipliers—Constrained Optimization
    It’s the ultimate tool yielded by multivariable differentiation: the method of Lagrange multipliers. Use this intuitive theorem and some simple algebra to optimize functions subject not just to boundaries, but to constraints given by multivariable functions. Apply this tool to a real-world cost-optimization example of constructing a box. x
  • 18
    Applications of Lagrange Multipliers
    How useful is the Lagrange multiplier method in elementary problems? Observe the beautiful simplicity of Lagrange multipliers firsthand as you reexamine an optimization problem from Lecture 7 using this new tool. Next, explore one of the many uses of constrained optimization in the world of physics by deriving Snell’s Law of Refraction. x
  • 19
    Iterated integrals and Area in the Plane
    With your toolset of multivariable differentiation finally complete, it’s time to explore the other side of calculus in three dimensions: integration. Start off with iterated integrals, an intuitive and simple approach that merely adds an extra step and a slight twist to one-dimensional integration. x
  • 20
    Double Integrals and Volume
    In taking the next step in learning to integrate multivariable functions, you’ll find that the double integral has many of the same properties as its one-dimensional counterpart. Evaluate these integrals over a region R bounded by variable constraints, and extrapolate the single variable formula for the average value of a function to multiple variables. x
  • 21
    Double Integrals in Polar Coordinates
    Explore integration from a whole new perspective, first by transforming Cartesian functions f(x.y) into polar coordinates defined by r and ?. After getting familiar with surfaces defined by this new coordinate system, see how these coordinates can be used to derive simple and elegant solutions from integrals whose solutions in Cartesian coordinates may be arduous to derive. x
  • 22
    Centers of Mass for Variable Density
    With these new methods of evaluating integrals over a region, we can apply these concepts to the realm of physics. Continuing from the previous lecture, learn the formulas for mass and moments of mass for a planar lamina of variable density, and find the center of mass for these regions. x
  • 23
    Surface Area of a Solid
    Bring another fundamental idea of calculus into three dimensions by expanding arc lengths into surface areas. Begin by reviewing arc length and surfaces of revolution, and then conclude with the formulas for surface area and the differential of surface area over a region. x
  • 24
    Triple Integrals and Applications
    Explore integration from a whole new perspective, first by transforming Cartesian functions f(x.y) into polar coordinates defined by r and ?. After getting familiar with surfaces defined by this new coordinate system, see how these coordinates can be used to derive simple and elegant solutions from integrals whose solutions in Cartesian coordinates may be arduous to derive. x
  • 25
    Triple Integrals in Cylindrical Coordinates
    Just as you applied polar coordinates to double integrals, you can now explore their immediate extension into volumes with cylindrical coordinates—moving from a surface defined by (r,?) to a cylindrical volume with an extra parameter defined by (r,?,z). Use these conversions to simplify problems. x
  • 26
    Triple Integrals in Spherical Coordinates
    Similar to the shift from rectangular coordinates to cylindrical coordinates, you will now see how spherical coordinates often yield more useful information in a more concise format than other coordinate systems—and are essential in evaluating triple integrals over a spherical surface. x
  • 27
    Vector Fields—Velocity, Gravity, Electricity
    In your introduction to vector fields, you will learn how these creations are essential in describing gravitational and electric fields. Learn the definition of a conservative vector field using the now-familiar gradient vector, and calculate the potential of a conservative vector field on a plane. x
  • 28
    Curl, Divergence, Line Integrals
    Use the gradient vector to find the curl and divergence of a field—curious properties that describe the rotation and movement of a particle in these fields. Then explore a new, exotic type of integral, the line integral, used to evaluate a density function over a curved path. x
  • 29
    More Line Integrals and Work by a Force Field
    One of the most important applications of the line integral is its ability to calculate work done on an object as it moves along a path in a force field. Learn how vector fields make the orientation of a path significant. x
  • 30
    Fundamental Theorem of Line Integrals
    Generalize the fundamental theorem of calculus as you explore the key properties of curves in space as they weave through vector fields in three dimensions. Then find out what makes a curve smooth, piecewise-smooth, simple, and closed. Next, manipulate curves to reveal new, simpler methods of evaluating some line integrals. x
  • 31
    Green’s Theorem—Boundaries and Regions
    Using one of the most important theorems in multivariable calculus, observe how a line integral can be equivalent to an often more-workable area integral. From this, you will then see why the line integral around a closed curve is equal to zero in a conservative vector field. x
  • 32
    Applications of Green’s Theorem
    With the full power of Green’s theorem at your disposal, transform difficult line integrals quickly and efficiently into more approachable double integrals. Then, learn an alternative form of Green’s theorem that generalizes to some important upcoming theorems. x
  • 33
    Parametric Surfaces in Space
    Extend your understanding of surfaces by defining them in terms of parametric equations. Learn to graph parametric surfaces and to calculate surface area. x
  • 34
    Surface Integrals and Flux Integrals
    Discover a key new integral, the surface integral, and a special case known as the flux integral. Evaluate the surface integral as a double integral and continue your study of fluid mechanics by utilizing this integral to evaluate flux in a vector field. x
  • 35
    Divergence Theorem—Boundaries and Solids
    Another hallmark of multivariable calculus, the Divergence theorem, combines flux and triple integrals, just as Green’s theorem combines line and double integrals. Discover the divergence of a fluid, and call upon the gradient vector to define how a surface integral over a boundary can give the volume of a solid. x
  • 36
    Stokes’s Theorem and Maxwell's Equations
    Complete your journey by developing Stokes’s theorem, the third capstone relationship between the new integrals of multivariable calculus, seeing how a line integral equates to a surface integral. Conclude with connections to Maxwell’s famous equations for electric and magnetic fields—a set of equations that gave birth to the entire field of classical electrodynamics. x

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Your professor

Bruce H. Edwards

About Your Professor

Bruce H. Edwards, Ph.D.
University of Florida
Dr. Bruce H. Edwards is Professor of Mathematics at the University of Florida. Professor Edwards received his B.S. in Mathematics from Stanford University and his Ph.D. in Mathematics from Dartmouth College. After his years at Stanford, he taught mathematics at a university near Bogot·, Colombia, as a Peace Corps volunteer. Professor Edwards has won many teaching awards at the University of Florida, including Teacher of...
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Understanding Multivariable Calculus: Problems, Solutions, and Tips is rated 5.0 out of 5 by 25.
Rated 5 out of 5 by from Multivariable Calculus Sorted. A wonderfully supreme course masterly taught and presented. The animations, graphics, video clips and visuals were magnificent. One of your best courses ever. Very highly recommended.
Date published: 2017-10-09
Rated 4 out of 5 by from Great lecture sequence and examples I purchased mainly as a review/refresher course. The professors presentation is well done with practical (real world) examples. My only minor gripe would be that more time should be devoted to "Physics" concepts like Maxwell's Equations.
Date published: 2017-06-19
Rated 5 out of 5 by from Bruce Edward's teaching. I have purchased Edward's pre-Calculus course as well as one of his calculus courses. His coverage is excellent and his presentations are excellent. In addition, his pedagogy (overall) is superb. I have one complaint. To wit, he refuses to call the natural logarithm by its proper name of "ln" - pronounced "lin". He correctly states that mathematicians and scientists almost always use logs to the base 10 or e, when logarithms can be taken to ANY real number base, except zero or one. He correctly refers to base 10 logarithms as "log", and logarithms to other bases as (for instance) "log to the base 4" of some real number. The base 10 is special and omnipresent so it is proper to refer to them as simply "logs". Well, the base e is also special, and he should be verbally calling logarithms to the base e as "lin" - referring to their mathematics abbreviation, ln. Edwards is the best math teacher I have ever run across. Please tell him I said this, and further add that if he were just a LITTLE bit better, he might be able to teach at Florida State. (He'll like that!) James H. Bentley, PhD
Date published: 2017-02-10
Rated 5 out of 5 by from Good Overview I needed to refresh some topics from my sophomore calculus course, especially div, curl, Green's Theorem, etc., and Prof. Edwards course was perfect for that purpose. The presentation is top-notch, topics are nicely explained, examples and exercises are straightforward. The emphasis is on understanding basic concepts and facility with calculations, not theory per se. In that respect, it would not be a substitute for a 2nd year calculus course, which would spend additional time on proofs, theory, and properties of operators, etc. But theory and proofs can come later - if you want. The exercises in the accompanying study book are generally easy - just what you need to verify your understanding, without getting mired down with the intricacies of very hard problems. Overall, this is a great introductory/refresher course in applying the concepts of multivariate calculus and is well worth the price. I would love to have had this DVD during the summer before my sophomore year in college - with the basic calculations/techniques in place, I would then have been able to better focus on the nuances of theory. Unfortunately, DVDs and the Internet didn't exist back then, but at least today's students have access to this wonderful resource.
Date published: 2016-11-27
Rated 5 out of 5 by from Tough Topic - Terrificallly Taught Going back to school in engineering. This is an advanced topic with many complexities but Prof Edwards does and excellent job explaining the material very clearly and in an organized fashion. Makes it possible for me to keep up with the subject even though has been a long time since I had last covered the topic. Highly recommend this presentation and teacher.
Date published: 2016-06-01
Rated 5 out of 5 by from I liked very much the application on Maxwell’s eq. After completing the 3 courses of calculus given by Professor Edwards, I would like to say that these are the best courses on calculus that I had ever taken. This last course has fantastic visual aids that facilitate the understanding of calculus in 3D. I would strongly suggest to the Teaching Company to get a Lineal Algebra course (by Professor Edwards) to complement these math courses.
Date published: 2016-05-18
Rated 5 out of 5 by from Third is challenging and a charm This is my third TTC calculus course taught by Dr. Edwards. The third is challenging and a charm! Why a charm? This course solidifies fundamental precalculus and elementary calculus skills. Dr. Edwards, once again, emphasizes the necessity for expertise in these fundamentals to understand and enjoy higher mathematics. For me, use of these skills became second nature in understanding and completing these lectures. Calculus III is challenging. This is not a "sit and listen" course; rather it is a course that requires time and engagement. For each lecture, I spent one hour or more to complete the lecture with notes and review of concepts. Without that commitment, the course would be a waste of time. As other reviewers have written, this course requires fundamental knowledge of algebra, trigonometry and elementary calculus. Don't purchase this course if you do not have these skills!. Finally, Dr. Edwards is the consummate teacher. His presentations are clear; he makes complex concepts understandable by taking small bits of a problem and bringing them together into a whole (Integration!). I am a medical school professor, and I learn continually from other professors like Dr. Edwards. He has deep knowledge of his subject, speaks well, has poise, and presents himself with elegant dress and appearance. Dr. Edwards is a role model for students and for teachers.
Date published: 2016-03-04
Rated 5 out of 5 by from A Class Act Professor Edwards is one of the great teachers of my autodidact career: a sharp intellect; a sharp sense of humor; and yes, a sharp dresser. In short, a class act. I've been lucky to have had a few teachers in various disciplines who successfully balanced tough demands on students with elegant presentation of material, but never (until The Great Courses) in mathematics. Perhaps like many otherwise strong students in middle school and high school, I had my early enthusiasm for mathematics quelled to the point of boredom by constant exposure to the New Math as taught in a program with the acronym "SSMCIS" (which students and teachers pronounced as "SMIX"). By the time we reached high school and were studying calculus, even the teachers quietly despised the SSMCIS textbooks — which began the study of calculus with a detailed and perplexing account of continuity — and after some equally quiet rioting, swapped the New Math books for the old Thomas calculus text instead. For many decades after high school, I pondered the problem of re-treading my knowledge of mathematics — not for any practical purpose but for the sake of grasping its essentials — and only recently found a satisfying solution in The Great Courses mathematics series. Kudos, again, to the brilliant Bruce Edwards, as well as to the ever patient and methodical James Sellers, the impressive Edward Burger and Arthur Benjamin, and the engaging Michael Starbird.
Date published: 2016-01-22
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