# Will Jagy

Berkeley, California

zakuski.math.utsa.edu/~jagy

Age: 59

My main activity is in number theory of integral positive ternary quadratic forms. This began through years of working with Irving Kaplansky. Much of his unpublished writing on quadratic forms can be found as pdfs at http://zakuski.math.utsa.edu/~kap/forms.html and about Lie and Jordan superalgebras at http://zakuski.math.utsa.edu/~kap/superalgebra.html One of my own email addresses can be found easily using the search feature at http://www.ams.org/cml and just putting in my last name
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Feb 1 at 21:20

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## Convergence of $\sqrt{n}x_{n}$ where $x_{n+1} = \sin(x_{n})$

Jan 11 '13 at 14:53

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## Which Fibonacci numbers are the sum of two squares?

Oct 25 '12 at 14:56

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## Mod sequences that seem to become constant; and the number 316

Dec 29 '14 at 20:36

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## How to obtain $f(x)$, if it is known that $f(f(x))=x^2+x$?

Sep 21 '15 at 17:29

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## The current status of the Birch & Swinnerton-Dyer Conjecture

May 11 '12 at 4:36

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Feb 15 at 17:31

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## Is $1847^{2013}+2$ really a prime?

Dec 16 '13 at 17:12

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## Minimum of $n$? $123456789x^2 - 987654321y^2 =n$ ($x$,$y$ and $n$ are positive integers)

Jul 15 '13 at 19:00

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## Given a matrix, is there always another matrix which commutes with it?

Dec 28 '15 at 20:23

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