# Number Theory Forum

Number Theory Help Forum

1. ### find integer solution

• Replies: 7
• Views: 872
Mar 29th 2014, 10:13 PM
2. ### If x is congruent to a modulo n then either x is congruent to a modulo 2n or...

• Replies: 2
• Views: 639
Mar 22nd 2014, 07:14 AM
3. ### Making sense of a proof that every integer is congruent modulo n to some element of S

• Replies: 2
• Views: 752
Mar 21st 2014, 06:00 PM
4. ### 6^n + 4 is divisible by 10

• Replies: 14
• Views: 1,140
Mar 21st 2014, 02:09 PM
5. ### Help with Relations equivalence Q

• Replies: 3
• Views: 539
Mar 17th 2014, 09:12 AM
6. ### mathematical proof

• Replies: 13
• Views: 973
Mar 16th 2014, 02:52 PM
7. ### congruence of binomial coefficients

• Replies: 4
• Views: 1,082
Mar 10th 2014, 11:24 AM
8. ### congruence identity

• Replies: 2
• Views: 600
Mar 7th 2014, 05:08 AM
9. ### find number of numbers satisfying the following inequations

• Replies: 3
• Views: 790
Mar 5th 2014, 03:47 PM
10. ### visualizing convegence

• Replies: 2
• Views: 602
Mar 4th 2014, 05:57 PM
11. ### Prove that x is divisible by 11 if alternate sum is divisible by 11

• Replies: 1
• Views: 1,120
Mar 2nd 2014, 09:24 PM
12. ### Relatively Prime proof

• Replies: 1
• Views: 640
Feb 17th 2014, 09:24 PM
13. ### Prove that out of two consecutive integers, one is divisible by 2

• Replies: 1
• Views: 694
Feb 17th 2014, 08:13 PM
14. ### Next number in the series ?

• Replies: 1
• Views: 2,933
Feb 16th 2014, 06:56 AM
15. ### Let n be an integer greater than one. Prove that n is a perfect square i.f.f. ...

• Replies: 4
• Views: 1,351
Feb 16th 2014, 04:25 AM
16. ### divisibility

• Replies: 2
• Views: 617
Feb 15th 2014, 04:35 PM
17. ### Particular solution for diophantine equation

• Replies: 3
• Views: 898
Feb 14th 2014, 05:03 PM
18. ### difficult induction problem

• Replies: 1
• Views: 1,052
Feb 9th 2014, 10:04 PM
19. ### Prove by induction

• Replies: 5
• Views: 628
Feb 8th 2014, 06:49 AM
20. ### Suppose that p=2^k-1 is prime. Prove that either k=2 or k is odd.

• Replies: 1
• Views: 1,971
Feb 7th 2014, 06:01 PM
21. ### Showing that a number is rational/irrational

• Replies: 10
• Views: 1,309
Feb 2nd 2014, 06:04 PM
22. ### Proof by Induction with Inequalities

• Replies: 3
• Views: 516
Jan 29th 2014, 02:01 PM
23. ### Transitive law

• Replies: 1
• Views: 695
Jan 23rd 2014, 01:13 AM
24. ### divisor of 0

• Replies: 1
• Views: 979
Jan 21st 2014, 05:25 AM
25. ### An interesting algorithm

• Replies: 1
• Views: 728
Jan 10th 2014, 12:01 PM
26. ### Coding Theory - Constructing Binary (n, M, d) - Codes

• Replies: 6
• Views: 2,005
Dec 31st 2013, 12:43 AM
27. ### An example of 2 quadratic integers in the same quadratic field

• Replies: 1
• Views: 712
Dec 29th 2013, 11:56 AM
28. ### Simplifying an Infinite Composite Recursion in a System of Equations

• Replies: 4
• Views: 1,075
Dec 20th 2013, 10:14 PM

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### Phi(mn)=phi(gcd(m,n))phi(lcm(m,n))

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