Discrete Math Forum

Discrete Math Help Forum: Discrete mathematics, logic, set theory

1. Difference equation tutorial: draft of part I

• Replies: 4
• Views: 3,233
Jun 14th 2014, 02:54 AM

• Replies: 0
• Views: 3,181
Feb 11th 2011, 12:34 PM
3. List of rules used to moderate MHF - please read carefully.

• Replies: 0
• Views: 2,092
Jul 19th 2010, 11:33 PM
1. help with cantor diagonalization

• Replies: 1
• Views: 326
Oct 14th 2013, 02:28 PM
2. Propositional Logic challenge (university level)

• Replies: 1
• Views: 510
Oct 13th 2013, 06:07 PM
3. Convert boolean expression into SOP and POS algebraically

• Replies: 3
• Views: 1,058
Oct 13th 2013, 05:35 PM
4. Proof by induction, 2^k-1 +1 = k+1

• Replies: 5
• Views: 699
Oct 13th 2013, 11:51 AM
5. Prove that 2|(n^4 - 3) if and only if 4|(n^2+3)

• Replies: 5
• Views: 573
Oct 11th 2013, 07:12 AM
6. Proving espilon > x in S

• Replies: 8
• Views: 407
Oct 10th 2013, 08:02 PM
7. Maximum, minimum, infimum, and supremum help!

• Replies: 2
• Views: 567
Oct 10th 2013, 06:20 PM
8. Prove: Let x >=0, x is real number such that any(Epsilon) e > 0, x <= e. Prove x = 0

• Replies: 2
• Views: 959
Oct 9th 2013, 08:23 PM
9. rationals and union of intervals that covers it

• Replies: 5
• Views: 396
Oct 9th 2013, 11:55 AM
10. Prove that if a|b and b|a, then a=b or a=-b

• Replies: 3
• Views: 390
Oct 8th 2013, 07:10 PM
11. Prove that if xy is odd, then x and y are odd. Proof by cases

• Replies: 13
• Views: 2,805
Oct 7th 2013, 06:05 PM
12. Establish this logical equivalence, where x does not occur as a free variable in A.

• Replies: 5
• Views: 2,450
Oct 7th 2013, 12:35 PM
13. Find Transitive Closure

• Replies: 1
• Views: 622
Oct 7th 2013, 04:35 AM
14. Show that if A and B are sets with A ⊆ B, then A ∪ B = B.

• Replies: 4
• Views: 5,832
Oct 6th 2013, 05:48 PM
15. Bijection question

• Replies: 5
• Views: 341
Oct 6th 2013, 12:44 PM
16. big O witnesses

• Replies: 3
• Views: 805
Oct 6th 2013, 07:45 AM
17. big o

• Replies: 1
• Views: 247
Oct 5th 2013, 08:34 AM
18. wheel grAPH

• Replies: 1
• Views: 411
Oct 5th 2013, 08:31 AM
19. relation

• Replies: 1
• Views: 316
Oct 5th 2013, 08:26 AM
20. Want to know an intuitive but valid way of making metric sets

• Replies: 2
• Views: 284
Oct 4th 2013, 12:11 PM
21. Composite Functions

• Replies: 1
• Views: 438
Oct 3rd 2013, 03:18 AM
22. Prove that 2n^2 + n is odd if and only if cos(npi/2) is even

• Replies: 3
• Views: 1,779
Oct 2nd 2013, 05:28 PM
23. How to disprove that all numbers A1,A2,A3, A4....An are less than their average?

• Replies: 3
• Views: 401
Oct 2nd 2013, 03:53 PM
24. Help proving NAND gate is equaivalent to an OR gate

• Replies: 4
• Views: 356
Oct 1st 2013, 10:39 PM
25. Using First DeMorgan's Law to Derive the Second

• Replies: 5
• Views: 5,364
Oct 1st 2013, 05:45 PM
26. Question with power sets

• Replies: 3
• Views: 673
Oct 1st 2013, 01:42 PM
27. How would one make this statement false?

• Replies: 2
• Views: 391
Oct 1st 2013, 07:08 AM
28. Proof that there exists irrational x,y such that x^y is rational. Valid or not?

• Replies: 4
• Views: 874
Sep 30th 2013, 03:30 PM

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