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bio website notesonmathematics.wordpress.…
location India
age 31
visits member for 3 years, 8 months
seen 19 hours ago

A simple student.


1d
revised Isomorphisms between $(\mathbb Z_4,+)$ and $(U_5,*)$
cleaned up a little
2d
comment What is the integral of $1/(1+x)$
Have you tried plotting the difference of these two functions?
Jan
19
answered Big list of “guided discovery” books
Jan
17
awarded  Popular Question
Jan
17
answered Proving Steiner triple system
Jan
17
revised Lazy Caterer's Problem: why a new line can cut all the others
why was the answer deleted
Jan
16
asked Lazy Caterer's Problem: why a new line can cut all the others
Dec
19
asked Proving Infinite Ramsey's theorem
Dec
17
comment Is there a great mathematical example for a 12-year-old?
Out of curiosity, what other non-Ramsey directions were you thinking about?
Dec
9
awarded  Caucus
Nov
20
awarded  Nice Answer
Oct
24
accepted Deriving Van der Waerden's theorem from Rado's theorem
Oct
20
revised Deriving Van der Waerden's theorem from Rado's theorem
added 4 characters in body
Oct
20
answered Deriving Van der Waerden's theorem from Rado's theorem
Oct
20
revised Deriving Van der Waerden's theorem from Rado's theorem
deleted 3 characters in body; edited tags
Oct
20
asked Deriving Van der Waerden's theorem from Rado's theorem
Sep
18
revised Chromatic Triangles on a k17 graph
chromatic triangle should be monochromatic triangle.
Sep
2
comment Automorphisms of the Petersen graph
@user170141: I found another proof and have written it here if you are interested: notesonmathematics.wordpress.com/2013/10/09/graph-automorphisms
Aug
29
comment What is the motivation for quaternions?
@metacompactness: Suppose each number was expressed as $a_0+a_1i+a_2j$. Then letting $ij=a_0+a_1i+a_2j$ and multiplying on both sides by $i$ using field axioms shows that $j$ is a complex number. So unless we drop some of the field axioms we cannot get anything beyond complex numbers.
Aug
12
accepted Comparing a vector with a directed line segment