SKU: 25888149481

Ordinary Differential Equations

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Description

Ordinary Differential EquationsThe theory of ordinary differential equations in real and complex domains is here clearly explained and analyzed. Not only classical theory, but also the main developments of modern times are covered. Exhaustive sections on the existence and nature of solutions, continuous transformation groups, the algebraic theory of linear differential systems, and the solution of differential equations by contour integration are as valuable to the pure

The theory of ordinary differential equations in real and complex domains is here clearly explained and analyzed. Not only classical theory, but also the main developments of modern times are covered. Exhaustive sections on the existence and nature of solutions, continuous transformation groups, the algebraic theory of linear differential systems, and the solution of differential equations by contour integration are as valuable to the pure mathematician as the fine treatment of the equations of Legendre, Bessel, and Mathieu, the conditions for the oscillatory character of solutions of a differential equation, and the relation between a linear differential system and an integral equation are to the engineer and the physicist.
Partial contents: real domain (elementary methods of integration, the existence and nature of solutions, continuous transformation-groups, linear differential equations-the general theory, with constant coefficients, solutions, algebraic theory, Sturmian theory, and later developments); complex domain (existence theorems, equations of first order, non-linear equations of higher order, solutions, systems, classifications of linear equations, oscillation theorems).
"Highly recommended." -- Electronics Industries.
"Deserves the highest praise." -- Bulletin, American Mathematical Society.



Binding Type: Paperback
Publisher: Dover Publications
Published: 06/01/1956
ISBN: 9780486603490
Pages: 576
Weight: 1.26lbs
Size: 8.36h x 5.41w x 1.05d
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SKU: 25888149481

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4.0 ★★★★★
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María Mondeja
West Palm Beach, US
★★★★★ 5
Perfect Balance of Comfort and Support!!
Size: King / 2 Packs, Color: White/Soft
I’ve been using these pillows for a few days now, and they’ve been amazing. They’re soft but still have that medium-firm support that keeps my neck comfortable no matter how I sleep. The 100% cotton cover feels really smooth and breathable, and I love that they’re hypoallergenic. They fluff up nicely after washing and keep their shape well. Honestly, they feel like hotel-quality pillows at home
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Reviewed in the United States on May 4, 2026
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Daine
Natrona Heights, US
★★★★★ 5
Juego de 2 almohadas
Size: Queen / 2 Packs, Color: White/Soft
These pillows are incredibly soft and comfortable! They provide the perfect balance between support and fluffiness, making them great for any sleeping position. The quality feels premium, and they stay cool throughout the night. Definitely a great purchase!
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Reviewed in the United States on April 21, 2026
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Eslaine Alvarez
Pawtucket, US
★★★★★ 5
Very comfortable
Size: Queen / 2 Packs, Color: White/Soft
These pillows are the best investment I could have possibly made. They are of incredible quality and are soft—qualities that allow you to rest much better, as prioritizing such things is essential for achieving deep sleep. And with a super soft fabric.
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Reviewed in the United States on April 17, 2026
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Joandra Dobao
Los Angeles, US
★★★★★ 4
Okay pillows
Size: King / 2 Packs, Color: White/Soft
Soft and comfortable, the only downside to the pillows is that the feathers pop out from the cover and pinch
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Reviewed in the United States on March 5, 2026
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Molly
Birmingham, US
★★★★★ 1
Do not recommend
Size: Standard / 2 Packs, Color: White/Soft
At an Airbnb in Marine CA, these pillows were on my bed. They were so wonderful, I took a picture of the label so I could order them for myself. After a few weeks, the feathers began working out of casing and would poke my head. I then put them in two pillowcases thinking that would make a difference- nope. When I removed the outer pillowcase to launder, there were 69-80 little feathers between the two layers. I went back to my old pillows and although they aren’t as great as down pillows, I don’t miss being poked and finding little feathers between the pillowcases and in my bedroom. Four months later, I am still finding a few random feathers in my bedroom.
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Reviewed in the United States on February 11, 2026

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