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# Discrete Math Forum

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

1. ### Difference equation tutorial: draft of part I

• Replies: 4
• Views: 4,066
Jun 14th 2014, 02:54 AM

• Replies: 0
• Views: 3,995
Feb 11th 2011, 12:34 PM
3. ### List of rules used to moderate MHF - please read carefully.

• Replies: 0
• Views: 2,545
Jul 19th 2010, 11:33 PM
1. ### boolean product of a matrices

• Replies: 3
• Views: 29,730
Jun 22nd 2008, 01:07 PM
2. ### Composite of relations R and S

• Replies: 3
• Views: 25,000
May 4th 2010, 03:51 PM
3. ### n Choose k Formula

• Replies: 4
• Views: 20,583
Jun 12th 2010, 02:14 PM
4. ### Inequality Induction Proof 2n+1 < 2^n for all integers n>= 3

• Replies: 2
• Views: 20,259
Nov 8th 2011, 11:19 AM
5. ### Set Theory Proof

• Replies: 3
• Views: 20,010
Sep 13th 2006, 02:54 PM
6. ### Math Proof A-(B∩C)=(A-B)∪(A-C).

• Replies: 3
• Views: 14,347
Apr 27th 2012, 08:46 AM
7. ### prove that if g o f is surjective then g is surjective

• Replies: 7
• Views: 13,234
Jan 18th 2011, 11:41 AM
8. ### If you are dealing with a standard deck of cards-how many...data management

• Replies: 2
• Views: 12,974
Sep 30th 2009, 06:20 PM
9. ### Number of possible pair sets

• Replies: 6
• Views: 12,299
Aug 5th 2010, 12:27 AM
10. ### Prove: f is one-to-one iff f is onto

• Replies: 12
• Views: 12,115
Jun 25th 2010, 11:02 AM
11. ### Discrete Math - Prove that if x is irrational, then 1/x is irrational?

• Replies: 7
• Views: 11,405
Jan 29th 2009, 04:26 AM
12. ### Prove the sqrt(8) is not a rational number

• Replies: 4
• Views: 11,252
May 14th 2016, 09:59 AM
13. ### Formal proof of "Law of ecxluded middle"

• Replies: 6
• Views: 11,117
May 23rd 2011, 05:05 PM
14. ### Is this correct? (It deals with A x B x C stuff)

• Replies: 7
• Views: 10,892
Feb 8th 2009, 08:42 AM
15. ### Proof for Associative Law for Symmetric Difference

• Replies: 9
• Views: 10,767
Dec 7th 2009, 03:21 AM
16. ### Strong induction

• Replies: 2
• Views: 10,765
Nov 22nd 2008, 02:00 PM
17. ### Witnesses for Big O

• Replies: 7
• Views: 10,332
Mar 11th 2006, 06:57 AM
18. ### Simplify boolean expression.

• Replies: 8
• Views: 10,171
Mar 1st 2011, 06:57 PM
19. ### Sets and bit strings

• Replies: 9
• Views: 10,062
Jun 9th 2008, 05:46 PM
20. ### cartesian product proofs

• Replies: 6
• Views: 9,425
Oct 29th 2009, 05:48 PM
21. ### Inverse of 3 modulo 7

• Replies: 7
• Views: 9,072
Oct 8th 2012, 12:04 PM
22. ### compostion of functions question - Discrete Math

• Replies: 1
• Views: 8,819
Nov 12th 2006, 12:42 AM
23. ### Inverse Composition of Functions Proof

• Replies: 9
• Views: 8,815
Sep 17th 2007, 06:26 AM
24. ### How many eight-bit strings contain exactly three 0's

• Replies: 7
• Views: 8,238
Dec 4th 2010, 09:06 AM
25. ### Show that if A and B are sets with A ⊆ B, then A ∪ B = B.

• Replies: 4
• Views: 8,229
Oct 6th 2013, 05:48 PM
26. ### Prove that the closed interval [0,1] is a closed set

• Replies: 4
• Views: 8,150
Sep 13th 2012, 05:28 PM
27. ### calculating number of onto functions

• Replies: 3
• Views: 8,060
Dec 17th 2009, 03:08 PM

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