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Description
Calculus of VariationsThis concise text offers both professionals and students an introduction to the fundamentals and standard methods of the calculus of variations. In addition to surveys of problems with fixed and movable boundaries, it explores highly practical direct methods for the solution of variational problems. Topics include the method of variation in problems with fixed boundaries; variational problems with movable boundaries and other problems; sufficiency
This concise text offers both professionals and students an introduction to the fundamentals and standard methods of the calculus of variations. In addition to surveys of problems with fixed and movable boundaries, it explores highly practical direct methods for the solution of variational problems.Topics include the method of variation in problems with fixed boundaries; variational problems with movable boundaries and other problems; sufficiency conditions for an extremum; variational problems of constrained extrema; and direct methods of solving variational problems. Each chapter features numerous illustrative problems, and solutions appear at the end.
Binding Type: Paperback
Publisher: Dover Publications
Published: 01/15/2007
ISBN: 9780486457994
Pages: 178
Weight: 0.33lbs
Size: 8.42h x 5.50w x 0.52d
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★★★★★ 5
Super Strong Hold with Magsafe & Sleek Design
I recently picked up this Tesla phone mount, and so far, I’m really impressed. The build quality feels solid, with durable plastic and a secure grip that holds my phone in place even on bumpy roads. Installation was straightforward—no tools needed—and it fits neatly behind the screen without blocking any view or controls.
The magnetic ring provides extra stability, and the adjustable arms are wide enough to fit most phones, even with a case. It rotates smoothly for both horizontal and vertical viewing, which is perfect for navigation or hands-free calls.
Overall, it’s a sleek, practical addition to the Tesla interior. If you’re looking for a minimalist, stable phone holder that blends well with the car’s design, this one’s definitely worth it.
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Reviewed in the United States on July 25, 2025
★★★★★ 1
Broke after 6 months
First the pros - strong magnet and does well what it's made for.
Cons - the magnet came out after 6 months. So the product is of poor quality.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Keeps phone cool off phone charging pads!
I bought this magnetic phone mount for my Tesla Model X and it works great. The magnet is extremely strong and holds my phone securely, even over bumps and rough roads. Once it’s attached, the phone doesn’t move at all.
Installation was quick and easy, and it fits the Model X interior nicely without looking out of place. It keeps the phone in a convenient spot for navigation or music without blocking the main screen.
Overall, it’s a solid, well-made mount that does exactly what it’s supposed to do. If you have a Model X and want a strong magnetic phone mount, this is a great buy.
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Reviewed in the United States on January 11, 2026
★★★★★ 5
Super Strong Magnet & Perfect Fit for My Tesla
I’m really happy with this Tesla phone mount. The magnet is extremely strong—my phone stays in place even when I’m driving on bumpy roads. Installation was quick and easy, and it attaches securely without blocking the screen or getting in the way.
I love how clean and minimal it looks in the car. The rotation is smooth, and it makes it easy to check maps or take calls hands-free.
If you want a reliable and sturdy phone mount that matches the Tesla interior, this one is perfect. Highly recommend!
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Reviewed in the United States on November 27, 2025
★★★★★ 4
Good quality, outstanding customer service
The mount is stylish; it looks great in a Tesla. The quality is good. However, the 2025 version broke after 1 year of use, which they fixed in 2026. The customer service is great!
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Reviewed in the United States on May 21, 2026
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