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Brett Frankel

Philadelphia, PA

math.upenn.edu/~frankelb

I'm currently (winter 2012) a first year graduate student at the University of Pennsylvania.

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Top Questions
Top Answers
12
Why do we consider prime numbers important, and what are their applications other than number theory in pure math?
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11
Probability that a coin lands on tails an odd number of times when it is tossed $100$ times
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11
Importance of rigor
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11
Fun but serious mathematics books to gift advanced undergraduates.
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9
If a polynomial has only rational roots does that automatically mean it is solvable?
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9
De Morgan's Second law
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8
A linear transformation with no eigenvector basis?
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7
A subring of the field of fractions of a PID is a PID as well.
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7
How do calculators handle $\pi$?
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6
What does $\sqrt[n]{z}$ mean, when $z$ is an arbitrary complex number?
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6
Infinite area but less than $1/x$ (eventually)
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6
How to prove that for $x$,$y$ positive if $x > y$, then $\frac{1+2x}{1+x} > \frac{1+2y}{1+y}$?
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6
What does the topology on $\operatorname{Spec}(R)$ tells us about $R$?
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5
Differentiable function with nowhere differentiable derivitive
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5
Is the thingie/cothingie distinction absolute?
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5
What is expected number of turns to play this children's game?
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5
Brauer group of a finite field is trivial
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5
Basic questions about definitions in category theory
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5
Continuous map to quotient space
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5
Dice/Card Probability
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5
Equivalence relation defined by a group action
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5
What does it really mean for something to be “trivial”?
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5
Theorems with an extraordinary exception or a small number of sporadic exceptions
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5
Complex differentiability vs differentiability in $\mathbb{R}^2$
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5
$Aut_\mathbb{Q}(\overline{\mathbb{Q}})$ is uncountable
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5
Every finite extension of a finite field is separable
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5
$G$ is a non-abelian group with nontrivial centre $C$. Then the centre of $G/C$ trivial?
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5
Necessarily complex analytic proofs in algebra.
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5
Showing diffeomorphism between $S^1 \subset \mathbb{R}^2$ and $\mathbb{RP}^1$
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5
Appending a point at infinity to $\mathbb{F}_q$
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