Algebras of Unbounded Operators (Aleksey Ber)

Algebras of Unbounded Operators (Aleksey Ber)

Marsoni

M251S

$103.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Algebras of Unbounded Operators (Aleksey Ber)Derivations on von Neumann algebras are well understood and are always inner, meaning that they act as commutators with a fixed element from the algebra itself. The purpose of this book is to provide a complete description of derivations on algebras of operators affiliated with a von Neumann algebra. The book is designed to serve as an introductory graduate level to various measurable operators affiliated with a von Neumann algebras and their

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Best money ever spent hours of fun. We have 3 dogs. They all love to play with this toy. We got the size 3 large is what we ordered. I'm not going to lie I thought it would be bigger when I ordered it. Two of our dogs are large breeds and the other is medium. It's not too big for the medium to play with it. It comes with a ball pump included so convenient. The little tabs are very durable. I can't recommend this enough. This has no squeaking or any sounds. It's nice that you can play with your four legged companion or you can have them play tug or just enjoy pushing the ball around. It is very versatile in play and stimulation.

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Reviewed in the United States on June 8, 2025

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allyson handabaka

Houston, US

★★★★★ 3

Not for chewers

Size: 8 Inch, Color: Yellow, Size: 8 Inch, Color: Yellow

My dog managed to pop this and completely chew through it in a matter of 4 days. It was definitely cute and she loved the size of it but with her chewing all the way to the core we have to get rid of it. I thought it was a good material but I guess I was wrong. Kind of sad considering the money spent only lasted 4 days

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Reviewed in the United States on April 9, 2026

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Jessica

New York, US

★★★★★ 5

Great dog toy

Size: 8 Inch, Color: Pink

The amount of stupid and cute these dogs look like when they shake this ball and smack their own faces! It took a hot second for either dog to understand where to bite on the ball, but now that they do, they both will play with it for a while. Great purchase, came with a pump to blow the ball up.

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Reviewed in the United States on January 14, 2026

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Richard H Harrison

Waukegan, US

★★★★★ 5

Great toy to play fetch with the dogs.

Color: Black/White, Size: Large

These balls are a great dog toy to play fetch with your dogs. This not the first ball I have gotten for the dogs. Just the right size and weight for medium sized dogs. I have less concerns about them possibly choking on these soccer balls versus tennis balls. So I can leave them out for them to play with. The are easy to inflate using the included pump. My only concern is the durability of the straps as my dogs have almost torn off one the straps of the previous ball I purchased.

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Reviewed in the United States on May 2, 2026

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Kendall

Bozeman, US

★★★★★ 5

Dog parents; buy this now!

Color: Black/White, Size: Medium

A must have for my pup! I have bought this at least 5 times. She eventually pops them and I need a new one. It's an amazing toy that she can thrash and we can play fetch with

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Reviewed in the United States on May 1, 2026