# Number Theory Forum

Number Theory Help Forum

1. ### No integer solutions to x^4 + y^4=100

• Replies: 1
• Views: 2,651
Oct 17th 2009, 10:04 AM
2. ### d divides n and u = v (mod d) then f(u) = f(v) (mod d) -> f is polynomial over Z_n

• Replies: 0
• Views: 485
Oct 16th 2009, 03:40 PM
3. ### Primes

• Replies: 1
• Views: 487
Oct 16th 2009, 08:13 AM
4. ### Prove these GCD(greast common denominator

• Replies: 2
• Views: 2,517
Oct 15th 2009, 03:18 PM
5. ### Proof with coprimes

• Replies: 8
• Views: 593
Oct 15th 2009, 11:06 AM
6. ### digit integer problem

• Replies: 2
• Views: 456
Oct 14th 2009, 12:00 PM
7. ### [SOLVED] On Divisibility by 19

• Replies: 5
• Views: 476
Oct 14th 2009, 08:23 AM
8. ### [SOLVED] I do not understand one of the steps in this Dirichlet product proof.

• Replies: 2
• Views: 499
Oct 14th 2009, 08:18 AM
9. ### Number problem

• Replies: 5
• Views: 488
Oct 14th 2009, 05:45 AM
10. ### Inverse of Euler's Phi Function

• Replies: 1
• Views: 2,716
Oct 14th 2009, 02:19 AM
11. ### help w/ one problem

• Replies: 1
• Views: 430
Oct 13th 2009, 06:02 PM
12. ### prove

• Replies: 1
• Views: 560
Oct 13th 2009, 05:16 AM
13. ### evaluating sine (or cos) at infinity

• Replies: 3
• Views: 2,641
Oct 13th 2009, 02:05 AM
14. ### CRT and System of Congruences

• Replies: 4
• Views: 956
Oct 12th 2009, 10:08 PM
15. ### Multiplication Inverses - how to express best?

• Replies: 3
• Views: 742
Oct 12th 2009, 08:47 PM
16. ### Diophantine equations

• Replies: 2
• Views: 764
Oct 12th 2009, 06:04 PM
17. ### Congruence

• Replies: 4
• Views: 663
Oct 12th 2009, 07:25 AM
18. ### show that if (a,b)=1,c>0, then (a+bx,c)=1 for some x

• Replies: 1
• Views: 1,337
Oct 11th 2009, 06:21 PM
19. ### Euler Totient

• Replies: 3
• Views: 595
Oct 11th 2009, 04:38 PM
20. ### primitive root

• Replies: 1
• Views: 513
Oct 10th 2009, 05:53 PM
21. ### prime number

• Replies: 4
• Views: 556
Oct 10th 2009, 03:34 PM
22. ### composite positive integers

• Replies: 9
• Views: 689
Oct 10th 2009, 06:43 AM
23. ### [SOLVED] Parentheses

• Replies: 2
• Views: 456
Oct 10th 2009, 06:37 AM
24. ### Proof Q

• Replies: 2
• Views: 421
Oct 10th 2009, 02:30 AM
25. ### congruence relation / residue classes

• Replies: 1
• Views: 545
Oct 9th 2009, 02:42 PM
26. ### binomial theorem help

• Replies: 5
• Views: 849
Oct 9th 2009, 03:25 AM
27. ### Tough prime testing question

• Replies: 1
• Views: 420
Oct 9th 2009, 02:41 AM
28. ### Greastest Common Divisor

• Replies: 5
• Views: 699
Oct 9th 2009, 01:24 AM
29. ### incongruent integers

• Replies: 1
• Views: 1,022
Oct 8th 2009, 05:43 PM
30. ### proof of infinite n's s.t. sqrt(n) = irrational

• Replies: 8
• Views: 3,614
Oct 8th 2009, 01:46 PM

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