Number Theory Forum

Number Theory Help Forum

1. Inverse in Galois field

• Replies: 2
• Views: 1,937
Apr 19th 2011, 11:42 PM
2. Proof by induction: 4^n + 6n + 8 is divisible by 9.

• Replies: 6
• Views: 5,948
Apr 19th 2011, 04:24 PM
3. How many digits?

• Replies: 6
• Views: 1,721
Apr 19th 2011, 11:51 AM
4. Finding a unique cube root

• Replies: 2
• Views: 799
Apr 19th 2011, 08:34 AM
5. Find function

• Replies: 5
• Views: 539
Apr 19th 2011, 04:04 AM
6. Help with last step of proof

• Replies: 3
• Views: 622
Apr 18th 2011, 11:00 PM
7. Finding a generator of a cyclic group

• Replies: 2
• Views: 2,171
Apr 16th 2011, 07:08 PM
8. Sum of Mobius and Divisor functions

• Replies: 1
• Views: 663
Apr 16th 2011, 05:59 PM
9. Irrational numbers.Why ?

• Replies: 6
• Views: 742
Apr 16th 2011, 12:12 PM
10. Show that it is an integer

• Replies: 1
• Views: 539
Apr 13th 2011, 12:22 AM
11. (10n+3,5n+2)=1

• Replies: 2
• Views: 1,067
Apr 12th 2011, 04:41 PM
12. Fermat's Little Theorem

• Replies: 2
• Views: 929
Apr 12th 2011, 05:28 AM
13. Divisibility of (n^5 - n) by 30

• Replies: 4
• Views: 2,340
Apr 12th 2011, 12:34 AM
14. 2p as the sum of squares

• Replies: 2
• Views: 735
Apr 11th 2011, 11:50 PM
15. Computing Legendre Symbol

• Replies: 0
• Views: 527
Apr 11th 2011, 07:55 PM
16. Congruence Proof using Wilson's Theorem

• Replies: 2
• Views: 1,196
Apr 11th 2011, 08:08 AM
17. sum of squares proof

• Replies: 3
• Views: 698
Apr 10th 2011, 06:24 PM
18. Prove that 9 is a factor of...

• Replies: 4
• Views: 968
Apr 9th 2011, 08:49 PM
19. Divisibility by 6

• Replies: 5
• Views: 454
Apr 9th 2011, 12:16 PM
20. Help understanding what this theorem means

• Replies: 2
• Views: 515
Apr 9th 2011, 12:48 AM
21. Show that Z=E mod 9, where E is the sum of digits of r (in dec. repres. of r)

• Replies: 1
• Views: 440
Apr 8th 2011, 03:33 PM
22. Greatest prime less than N

• Replies: 2
• Views: 630
Apr 8th 2011, 12:05 PM
23. sum of two squares?

• Replies: 2
• Views: 682
Apr 7th 2011, 07:23 AM
24. Basic Question regarding Simplification of congruences

• Replies: 1
• Views: 583
Apr 7th 2011, 03:24 AM
25. Prove this equality

• Replies: 1
• Views: 568
Apr 5th 2011, 11:16 PM
26. Injection implied by Surjection

• Replies: 4
• Views: 676
Apr 5th 2011, 08:16 PM
27. Diophantine eq

• Replies: 5
• Views: 663
Apr 5th 2011, 02:31 PM
28. Showing that the sum of three squares is not closed

• Replies: 1
• Views: 537
Apr 4th 2011, 12:31 PM
29. Divisibility by 30

• Replies: 5
• Views: 394
Apr 4th 2011, 11:13 AM
30. Sum over roots of unity

• Replies: 1
• Views: 772
Apr 4th 2011, 10:31 AM

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