# Zack

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bio website owlfolio.org location Pittsburgh, PA age 36 member for 2 years, 11 months seen yesterday profile views 11

Hello, my name is Zachary Weinberg. I go by “Zack,” except on paper. Pleased to meet you.

I’m about thirty-five years old, and I grew up in the suburbs of Los Angeles, California. I do computer security research at CMU.

I AM NOT LOOKING FOR A JOB. DO NOT CONTACT ME WITH ANY SORT OF JOB OFFER. I regret the bluntness and ALLCAPSNESS of the previous statement, but this account has become a principal source of the recruitment spam I get, and anything short of a flat-out upfront NO is completely ineffective. *waves old man cane at clouds*

# 4 Questions

 5 Generating geometrically-distributed variates over an interval given endpoints and expected value 2 If $f(f(x,a), b) = f(x, p)\; \forall x, a, b$, is it also true that $f(f^{-1}(f(x,a), b), c) = f(x, q) \;\forall x, a, b, c$? 1 Does the definite integral of (1 - tanh t) from 0 to x diverge as x goes to infinity? 1 solve equation of form $x = a - (b - x)^c$

# 194 Reputation

 +10 why there is no derivative in sharp turns? +30 How to define fractional factorials, like 3.6!? +5 Does the definite integral of (1 - tanh t) from 0 to x diverge as x goes to infinity? +5 If $f(f(x,a), b) = f(x, p)\; \forall x, a, b$, is it also true that $f(f^{-1}(f(x,a), b), c) = f(x, q) \;\forall x, a, b, c$?

 3 How to define fractional factorials, like 3.6!? 1 why there is no derivative in sharp turns?

# 10 Tags

 3 factorial 0 functions 1 derivatives 0 group-theory 0 discrete-mathematics 0 hyperbolic-functions 0 algebra-precalculus 0 improper-integrals 0 algorithms 0 random

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