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bio website marksapir.wordpress.com
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Professor of Mathematics at Vanderbilt University

Apr
10
comment Can an algebraic number on the unit circle have a conjugate with absolute value different from 1?
As I said, the coefficients are algebraic integers and stable under the action of the Galois group. Hence these coefficients are rational integers. What's wrong?
Apr
9
comment Can an algebraic number on the unit circle have a conjugate with absolute value different from 1?
@YCor: Do you know what Vieta's formulas are, en.wikipedia.org/wiki/Vieta%27s_formulas ? I have edited the answer making it more accessible.
Apr
7
reviewed Leave Open a question on 0-1 valued stochastic process
Apr
7
reviewed Leave Open Picard Group Can Contain rational curve?
Apr
7
revised Can an algebraic number on the unit circle have a conjugate with absolute value different from 1?
added 103 characters in body
Apr
7
comment Examples of theorems with proofs that have dramatically improved over time
@MCC: The fact that modular machines are equivalent to Turing machines is obvious and is explained in the 10-page proof.
Feb
24
awarded  semigroups
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7
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4
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17
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30
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31
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8
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