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Description
Intro to Calculus of VariationsThe calculus of variations is one of the oldest subjects in mathematics, yet is very much alive and is still evolving. Besides its mathematical importance and its links to other branches of mathematics, such as geometry or differential equations, it is widely used in physics, engineering, economics and biology. This book serves both as a guide to the expansive existing literature and as an aid to the non specialist mathematicians, physicists,
The calculus of variations is one of the oldest subjects in mathematics, yet is very much alive and is still evolving. Besides its mathematical importance and its links to other branches of mathematics, such as geometry or differential equations, it is widely used in physics, engineering, economics and biology.This book serves both as a guide to the expansive existing literature and as an aid to the non-specialist -- mathematicians, physicists, engineers, students or researchers -- in discovering the subjects most important problems, results and techniques. Despite the aim of addressing non-specialists, mathematical rigor has not been sacrificed; most of the theorems are either fully proved or proved under more stringent conditions.The book, containing more than seventy exercises with detailed solutions, is well designed for a course both at the undergraduate and graduate levels.Shipping Notes
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4.1 ★★★★★
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★★★★★ 5
Runs small
Color: Beige, Size: 6
Runs small
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Prom approval, great choice
Color: White, Size: X-Small
Thank you so much, this suit fits great on your average teenage boy size xs and I was nervous t first but he looks great in the suit. His prom will be memorable. My son like 5ft 5in weight about l50lbs too for those curious.
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Reviewed in the United States on May 21, 2026
★★★★★ 4
Right for the price!
Color: Brown, Size: Large, Color: Brown, Size: Large
True to size. Pants are thin, but it aligns with price
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Reviewed in the United States on May 3, 2026
★★★★★ 1
Size up
Color: Brown, Size: XX-Large
It's not true size.You have to go up
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Reviewed in the United States on January 20, 2026
★★★★★ 5
Great quality tux for the price
Color: White, Size: XX-Large, Color: White, Size: XX-Large
I was pleasantly surprised with the quality and fit right out of the package. The cloth has a subtle pattern that gives it an upscale look without being flashy, and overall it feels far nicer than I expected at this price.
Jacket:
The jacket has a good weight and thickness, so it feels solid and well-made. Sleeve length was perfect right out of the box, which almost never happens for me. The only fit issue was a bit of snugness in the chest and underarm area, but I have broad shoulders and a larger chest, so that’s not unusual. My dress shirt sleeve length is 36.5", so I went with an XXL instead of my usual XL to make sure the sleeves were long enough. That was the right call, because it’s always easier for a tailor to size something down than to try and make something too small work. Aside from a quick tweak in the chest, this could easily be worn straight out of the package.
Pants:
The pants are noticeably thinner than the jacket and you can kind of see through them, so you’ll want to be mindful when choosing undergarments. That said, the lighter fabric is actually a plus for summer outdoor events or warm indoor venues since it will help keep you cool and comfortable. The flexible waistband made them very comfortable, and the fit in both the waist and length was spot on. For reference, I usually wear 38x32 dress pants and these matched perfectly.
Overall:
The quality is excellent for the cost. Even with a minor tailoring bill, my total cost to own this tux will still be less than renting one for a single event. I couldn’t be happier with the purchase and wouldn’t hesitate to pick up another.
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Reviewed in the United States on August 13, 2025