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Feb
1
awarded  Yearling
Nov
23
reviewed No Action Needed Calculating $\sum_{n=1}^\infty {\frac{1}{2^nn(3n-1)}}$
Nov
23
reviewed No Action Needed A conjecture of the remainder of summary of a sequence of unified power numbers divided by a prime number
Oct
30
answered Can I think of Algebra like this?
Oct
19
reviewed No Action Needed Solve matrix equation $ CX= B$.
Oct
19
reviewed No Action Needed why $ \rm{lcm}[1,2,3,\cdots,n]\in (2^n,4^n)$
Oct
19
reviewed No Action Needed A concentration problem
Oct
19
comment substitution with 4 variables
4 equations with 4 unknowns can be solved a number of ways. Substitution is one method. The process is just an extension of two equations in two unknowns and three/three. There's nothing stopping you from extending this to N equations in N unknowns.
Oct
7
revised Is it possible to represent every irrational number as a (limit of) an infinite sum of rational numbers?
Corrected the value of e
Oct
7
comment Is it possible to represent every irrational number as a (limit of) an infinite sum of rational numbers?
I couldn't look at it any longer, edited e.
Oct
7
suggested approved edit on Is it possible to represent every irrational number as a (limit of) an infinite sum of rational numbers?
Oct
7
comment Is it possible to represent every irrational number as a (limit of) an infinite sum of rational numbers?
@robjohn - good catch. I was trying to ignore that. Focusing on the (in my opinion) non-answer.
Oct
7
comment Is it possible to represent every irrational number as a (limit of) an infinite sum of rational numbers?
OP was looking for a formulaic summation. His summation resulting in pi, for example, is all I need to spend some time to get N digits. Your answer doesn't offer that at all.
Sep
29
reviewed No Action Needed Levi decomposition for the parabolic subgroups
Sep
29
reviewed No Action Needed If $x,y$ are positive, then $\frac1x+\frac1y\ge \frac4{x+y}$
Sep
29
reviewed No Action Needed Need some help on petri nets?
Sep
29
reviewed No Action Needed prove that any integer greater than or equal to 8 can be represented as the sum of nonnegative integer multiples of 3 and 5
Sep
29
reviewed No Action Needed Perrin numbers in terms of the generalized hypergeometric function?
Sep
29
reviewed No Action Needed Revisited: Binomial Theorem: An Inductive Proof
Sep
29
reviewed No Action Needed Free crossed modules