866 reputation
415
bio website
location Warsaw, Poland
age 25
visits member for 2 years, 1 month
seen Dec 9 at 15:00

Math student at Warsaw University. Huge fan of board games.


Dec
9
comment Random walk on a graph: getting to the opposite node
for both center vertices its obviously 1/2
Dec
9
awarded  Caucus
Nov
25
comment Distinguish between left and right polygon
If the polygon is convex it is enough to check the cross product of any two given consecutive edges, treated as vectors with the same origin. For polygon $ABCDE$ it would be $CB \times CD$
Nov
14
accepted What is a sparse subset?
Nov
14
reviewed No Action Needed Prove by induction for$ P(x)$
Nov
14
revised Is this combinatorial problem for noncommutative variables known?
added definition
Nov
14
suggested approved edit on Is this combinatorial problem for noncommutative variables known?
Nov
14
comment Is this combinatorial problem for noncommutative variables known?
Binomial(n, floor(n/2)) -> oeis.org/A001405 has description well fitting your problem: it is also the number of distinct strings of length n, each of which is a prefix of a string of balanced parentheses
Nov
14
comment What is a sparse subset?
@QiaochuYuan what does that mean in terms of subsets of vectors then?
Nov
14
answered Proof By Induction Fibonacci Numbers
Nov
14
revised Proof By Induction Fibonacci Numbers
improved formatting
Nov
14
suggested approved edit on Proof By Induction Fibonacci Numbers
Nov
14
asked What is a sparse subset?
Nov
9
awarded  Yearling
Sep
30
awarded  Explainer
Sep
24
awarded  Autobiographer
Nov
9
awarded  Yearling
Apr
2
answered How do I prove: $\cos (\theta + 90^\circ) \equiv - \sin \theta $
Feb
8
awarded  Revival
Feb
4
comment How to check if my dataset is normally distributed?
Also, what do you mean by programatically? In most environments there are functions (as in SAS, R, SPSS) or libraries (python, java) that have some kind of normality test implemented (eg en.wikipedia.org/wiki/Shapiro%E2%80%93Wilk_test)