151 reputation
9
bio website esham.io
location United States
age 26
visits member for 2 years, 11 months
seen 2 days ago

Recovering physicist. I write desktop GUIs and embedded-system code for a scientific-equipment manufacturer. I have experience with Objective-C/Cocoa, Clojure, Python, C, C++, Ruby, HTML, CSS, JavaScript, and others.


Apr
25
comment How can I write the numbers 5 and 7 as some sequence of operations on three 9s?
The question did say to use exactly three instances of the number 9, though.
Apr
9
comment Which number is larger and Why? 1.7 or 1.73205
The OP was asking a basic arithmetic question—doing any kind of algebraic manipulation to explain it is probably overkill (and likely to go over OP’s head) :-)
Apr
9
comment Which number is larger and Why? 1.7 or 1.73205
This answer isn’t really on the same level as the question being asked…
Mar
24
revised Why is one proof for Cauchy-Schwarz inequality easy, but directly it is hard?
Clean up TeX markup and output
Mar
24
suggested suggested edit on Why is one proof for Cauchy-Schwarz inequality easy, but directly it is hard?
Nov
16
awarded  Critic
Aug
29
revised A gardener plants three maple trees, four oaks, and five birch trees in a row. …
Use TeX formatting and copyedit
Aug
29
suggested suggested edit on A gardener plants three maple trees, four oaks, and five birch trees in a row. …
Jun
7
awarded  Autobiographer
Feb
26
awarded  Analytical
Feb
26
awarded  Informed
Aug
27
comment Is the statement “1/3 of the natural numbers are divisible by 3” true? Is anything similar to it true?
I think a slightly more formal way to say this would be, “the cardinality of the natural numbers divisible by 3 is the same as the cardinality of the natural numbers indivisible by 3.”
Sep
21
awarded  Teacher
Sep
21
answered Re-writing a logarithm to a power
Sep
6
awarded  Editor
Sep
6
revised Computing square roots and calculus
TeXify the equations
Sep
6
suggested suggested edit on Computing square roots and calculus
Sep
6
awarded  Scholar
Sep
6
accepted Is there an elegant way to determine which subgroups of $S_3$ are normal?
Sep
5
comment Is there an elegant way to determine which subgroups of $S_3$ are normal?
In the first exercise, when you say “$\alpha$ and $\beta$ are conjugate in $S_n$” does that mean that $\alpha \beta \alpha^{-1} = \beta$?