Algebra
Moderator: elim
17 topics • Page 1 of 1
-
- Topics
- Replies
- Views
- Last post
-
- Close form of $1+\sum_{j=1}^n j! j$
by elim » Tue Nov 15, 2011 8:21 pm - 1 Replies
- 4178 Views
- Last post by elim
Tue Nov 15, 2011 8:25 pm
- Close form of $1+\sum_{j=1}^n j! j$
-
- Pell's equation $m^2 = pn^2+1$ ($p$ is prime)
by elim » Tue Nov 15, 2011 10:50 am - 0 Replies
- 2463 Views
- Last post by elim
Tue Nov 15, 2011 10:50 am
- Pell's equation $m^2 = pn^2+1$ ($p$ is prime)
-
- A Collection of special trigonometric identities
by elim » Mon Sep 12, 2011 10:15 am - 1 Replies
- 2555 Views
- Last post by elim
Mon Sep 12, 2011 10:21 am
- A Collection of special trigonometric identities
-
- A property of Pythagorean triples
by karka » Tue Aug 02, 2011 10:37 am - 3 Replies
- 2676 Views
- Last post by Keesiaday
Fri Aug 05, 2011 4:05 pm
- A property of Pythagorean triples
-
- A property of Harmonic sum
by elim » Fri Aug 05, 2011 7:00 am - 1 Replies
- 2422 Views
- Last post by elim
Fri Aug 05, 2011 7:01 am
- A property of Harmonic sum
-
- You have great content!
by SEOSoftware » Fri Jun 17, 2011 8:06 am - 0 Replies
- 2927 Views
- Last post by SEOSoftware
Fri Jun 17, 2011 8:06 am
- You have great content!
-
- A problem about decimal number expression
by elim » Tue Feb 15, 2011 10:01 pm - 0 Replies
- 2583 Views
- Last post by elim
Tue Feb 15, 2011 10:01 pm
- A problem about decimal number expression
-
- Cubic Equations
by elim » Tue Feb 15, 2011 9:17 pm - 1 Replies
- 2342 Views
- Last post by elim
Tue Feb 15, 2011 9:23 pm
- Cubic Equations
-
- Solve $\cos^2 x + \cos^2 2x + \cos^2 3x = 1$
by elim » Tue Feb 15, 2011 8:45 pm - 0 Replies
- 1830 Views
- Last post by elim
Tue Feb 15, 2011 8:45 pm
- Solve $\cos^2 x + \cos^2 2x + \cos^2 3x = 1$
-
- Evaluate $\cos 36^{\circ}$
by elim » Tue Feb 15, 2011 8:03 pm - 1 Replies
- 1488 Views
- Last post by elim
Tue Feb 15, 2011 8:31 pm
- Evaluate $\cos 36^{\circ}$
-
- $\sum_1^n y_k \sum_1^n (x_k^2/y_k)-(\sum_1^n x_k)^2=\cdots$
by elim » Tue Feb 15, 2011 7:40 pm - 0 Replies
- 1600 Views
- Last post by elim
Tue Feb 15, 2011 7:40 pm
- $\sum_1^n y_k \sum_1^n (x_k^2/y_k)-(\sum_1^n x_k)^2=\cdots$
-
- Find $m,n \in \mathbb{N}, \sum_0^m x^k:=P_m(x) |P_m(x^n)$
by elim » Tue Feb 15, 2011 5:09 pm - 0 Replies
- 1645 Views
- Last post by elim
Tue Feb 15, 2011 5:09 pm
- Find $m,n \in \mathbb{N}, \sum_0^m x^k:=P_m(x) |P_m(x^n)$
-
- Liouville's theorem (on diophantine approximation)
by elim » Tue Feb 15, 2011 12:25 pm - 1 Replies
- 1413 Views
- Last post by elim
Tue Feb 15, 2011 12:37 pm
- Liouville's theorem (on diophantine approximation)
-
- Lagrange's Vector Identity: (a×b)×c = (a·c)b-(b·c)a
by elim » Sun Feb 13, 2011 7:56 am - 1 Replies
- 1383 Views
- Last post by elim
Tue Feb 15, 2011 7:43 am
- Lagrange's Vector Identity: (a×b)×c = (a·c)b-(b·c)a
-
- Lagrange's Identity $|a|^2|b|^2=(a\cdot b)^2+|a\wedge b|^2$
by elim » Mon Feb 14, 2011 7:25 am - 0 Replies
- 1593 Views
- Last post by elim
Mon Feb 14, 2011 7:25 am
- Lagrange's Identity $|a|^2|b|^2=(a\cdot b)^2+|a\wedge b|^2$
-
- Formula $(Re, Im)(\sqrt{a+ib}) \quad (a,b \in \mathbb{R})$
by elim » Fri Feb 11, 2011 6:49 pm - 1 Replies
- 1423 Views
- Last post by elim
Sat Feb 12, 2011 10:08 am
- Formula $(Re, Im)(\sqrt{a+ib}) \quad (a,b \in \mathbb{R})$
-
- Find \({a_n}\) by recursion \(a_1=1/2,\, \sum_{1}^{n} a_i = n^2 a_n\)
by elim » Fri Feb 12, 2010 10:15 am - 1 Replies
- 1249 Views
- Last post by elim
Fri Feb 12, 2010 11:53 am
- Find \({a_n}\) by recursion \(a_1=1/2,\, \sum_{1}^{n} a_i = n^2 a_n\)
17 topics • Page 1 of 1
Who is online
Users browsing this forum: No registered users and 1 guest
Forum permissions
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum