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Dr. Euler's Fabulous Formula: Cures Many Mathematical Ills

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Dr. Euler's Fabulous Formula: Cures Many Mathematical IllsIn the mid eighteenth century, Swiss born mathematician Leonhard Euler developed a formula so innovative and complex that it continues to inspire research, discussion, and even the occasional limerick. Dr. Euler's Fabulous Formula shares the fascinating story of this groundbreaking formula long regarded as the gold standard for mathematical beauty and shows why it still lies at the heart of complex number theory. In some ways a sequel to Nahin's An

In the mid-eighteenth century, Swiss-born mathematician Leonhard Euler developed a formula so innovative and complex that it continues to inspire research, discussion, and even the occasional limerick. Dr. Euler's Fabulous Formula shares the fascinating story of this groundbreaking formula--long regarded as the gold standard for mathematical beauty--and shows why it still lies at the heart of complex number theory. In some ways a sequel to Nahin's An Imaginary Tale, this book examines the many applications of complex numbers alongside intriguing stories from the history of mathematics. Dr. Euler's Fabulous Formula is accessible to any reader familiar with calculus and differential equations, and promises to inspire mathematicians for years to come.



Binding Type: Paperback
Publisher: Princeton University Press
Published: 04/04/2017
ISBN: 9780691175911
Pages: 416
Weight: 0.80lbs
Size: 8.40h x 5.40w x 1.20d
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SKU: 65593018470

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SAM
Birmingham, US
★★★★★ 5
My dogs favorite toy so far in two years
Color: C) 4" 2-Pack (Bacon)
I use this with my medium sized dog. These are large for him but that's what I want so I don't ever have to think about them being too small or a swallow hazard. He has been through A LOT OF TOYS in the last couple years, but nothing, NOTHING has he loved as much as these. His favorite used to be squeaker balls. Then his favorite was crackle balls. But he will gladly ignore both for this one. I don't know if it's the bacon flavor or what, but he go nuts for it.
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Reviewed in the United States on May 5, 2026
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Kathy
Bozeman, US
★★★★★ 5
Works well, tough
Held the bully stick firmly for my crazy aggressive pit bull lab mix. It's very heavy though. When she starts throwing it around you can really hear it. She also hasn't destroyed it. Worth the money.
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Reviewed in the United States on January 13, 2026
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Kim
Fort Morgan, US
★★★★★ 5
Great gadget!
This little gadget is a lifesaver! Holds bully sticks perfectly! Buy it! My pup enjoys using it and is easy to hold.
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Reviewed in the United States on January 11, 2026
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Alibill
Draper, US
★★★★★ 5
It absolutely holds a bully or collagen sticks in place!
This actually works! I was skeptical that it could hold a treat but it does hold my Aussies collagen sticks in place so he doesn’t just try to swallow them. It is pretty heavy too.
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Reviewed in the United States on October 21, 2025
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Natrona Heights, US
★★★★★ 4
Solid Build, But Not German Shepherd-Proof
I bought this bully stick holder for my German Shepherd, who is an aggressive chewer and has a talent for demolishing toys in minutes. The design is sturdy, and the material feels genuinely heavy-duty — no issues with cracks or breakage so far. However, the biggest problem I’ve run into is that the bully stick doesn’t always stay securely in place. My dog is strong and smart, and within a few minutes, he can twist or yank the stick loose and start chomping on the whole thing, which defeats the safety purpose. I’ve tried adjusting how I insert the stick, but it doesn’t always hold firm, especially with thinner bully sticks. That said, it does work better with thicker, straight sticks, so I’d recommend it if your pup isn’t quite as determined (or stubborn!) as mine. I still use it under supervision, and it slows him down a bit, but I was hoping for a more secure grip. Great idea and solid quality — just wish it was more GSD-proof.
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Reviewed in the United States on July 13, 2025

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