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StefanH

http://stefuzius.wordpress.com/

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Top Questions
33 votes

Why do people with perfect pitch perceive tunes not in 440 Hz out of tune?

tuning pitch absolute-pitch relative-pitch asked Mar 7, 2017 at 10:26
music.stackexchange.com

21 votes

With this definition of completeness, Gödel's Incompleteness result seems not surprising, so why it was back then?

logic first-order-logic incompleteness asked Apr 6, 2018 at 14:20
math.stackexchange.com

18 votes

How do the open sets look in the product topology?

general-topology analysis asked Jul 13, 2013 at 14:26
math.stackexchange.com

16 votes

Theoretical Question about "Smoke On The Water"

guitar theory rock tonal asked Apr 12, 2017 at 16:35
music.stackexchange.com

14 votes

On the realisation of monoids as syntactic monoids of languages

fl.formal-languages automata-theory regular-language algebra monoid asked Jun 9, 2016 at 18:55
cstheory.stackexchange.com

12 votes

How can a camera be both 12MP and 1080p, when 1920x1080 is just 2,073,600?

cameraphones megapixels specification asked Feb 1, 2017 at 12:18
photo.stackexchange.com

12 votes

The notation $\prod_{g\in G} g$ for a finite group not well-defined.

abstract-algebra group-theory asked Feb 9, 2013 at 22:18
math.stackexchange.com

12 votes

Using a fidget spinner to rotate in outer space

attitude microgravity rotation humans asked Dec 31, 2020 at 11:16
space.stackexchange.com

11 votes

Is there a difference between allowing only countable unions/intersections, and allowing arbitrary (possibly uncountable) unions/intersections?

general-topology analysis logic set-theory asked Jun 25, 2012 at 15:00
math.stackexchange.com

11 votes

Let $X$ and $Y$ be Banach spaces, show that if they are isomorphic, then $X$ is reflexive iff $Y$ is reflexive.

analysis functional-analysis banach-spaces asked Jan 6, 2013 at 23:19
math.stackexchange.com

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Top Answers
20
Can mathematics get from other sciences what it got from physics?
math.stackexchange.com

17
Why are regular expressions defined with union, concatenation and star operations?
cs.stackexchange.com

16
Are there a mathematical theorieshelp us to prove $ i^2={-1}$?
math.stackexchange.com

11
How are simple groups the building blocks?
math.stackexchange.com

11
Conway's lesser-known results
mathoverflow.net

7
What's the point in being a "skeptical" learner
math.stackexchange.com

7
Myhill-Nerode and closure properties
cs.stackexchange.com

7
Show that a semigroup with $aS \cup \{a\} = bS \cup \{b\}$ and $Sa \cup \{a\} = Sb \cup \{b\}$ is a group
math.stackexchange.com

7
For some learning piano at a later stage in life e.g past late 20s, what must they be aware of to make the most of it?
music.stackexchange.com

6
Regular language as finite union of periodic sets
cs.stackexchange.com

5
Generalization of $|HK|=\frac{|H||K|}{|H∩K| }$, where $H,K$ are finite subgroups
math.stackexchange.com

5
A good book for beginning Group theory
math.stackexchange.com

5
How to find the number of anti-symmetric relations?
math.stackexchange.com

5
Context free grammar where number of a's is larger than number of b's in any prefix of the string
cs.stackexchange.com

5
Is it recommended to learn a piece you really like, but is way above your level?
music.stackexchange.com

5
Algebra oriented branch of theoretical computer science
cstheory.stackexchange.com

5
Do Monoid Homomorphisms preserve the identity?
math.stackexchange.com

5
Has anyone mixed linear algebra with formal language theory in this way?
cstheory.stackexchange.com