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Discrete Mathematics, Set Theory, and Logic

Discrete Math, Graph Theory, Combinatorics, Recurrence Relations (Difference Equations), Set Theory, General and Symbolic Logic
chisigma
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Difference equation tutorial: draft of part II
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2
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8K
chisigma
chisigma
chisigma
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Difference equation tutorial: draft of part I
Replies
3
Views
9K
chisigma
chisigma
Ackbach
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  • Sticky
Please Read Before Posting Logic Questions
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0
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7K
Ackbach
Ackbach
evinda
Construct circuit that implements truth table
2
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38
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221
evinda
evinda
A
Question about Successor Function
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0
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30
agapito
A
M
Binomial problem.
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3
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58
Jameson
Jameson
evinda
Truth tables
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2
Views
68
evinda
evinda
evinda
Find truth value of propositions
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17
Views
84
evinda
evinda
A
Godelian self-reference
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0
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104
agapito
A
E
Rules of inference
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2
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269
Alan
A
E
proofs with real numbers
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8
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145
HallsofIvy
H
D
Symbolic logic
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1
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261
HallsofIvy
H
P
Please help with bool algebra and logic things!
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2
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375
Evgeny.Makarov
E
F
Introduction to Set Theory Stream
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1
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217
Klaas van Aarsen
Klaas van Aarsen
J
Probability of Having a Totally Dominating Set (Probabilistic Methods)
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1
Views
494
joypav
J
J
Minimum Degree of a Random Graph (Probabilistic Method)
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1
Views
335
joypav
J
J
Turans Theorem (Dual?)
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1
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255
joypav
J
mathmari
[SOLVED] Give a set and a relation that satisfies the properties
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10
Views
627
mathmari
mathmari
mathmari
Hilbert's hotel and busses : Injectivity - Surjectivity
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7
Views
604
Klaas van Aarsen
Klaas van Aarsen
J
Find Proofs for the following 5 propositional logic statements
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1
Views
506
HallsofIvy
H
Julio
Bipartite graphs
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0
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315
Julio
Julio
mathmari
Show that ~ is an equivalence relation
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2
Views
309
Evgeny.Makarov
E
mathmari
[SOLVED] Intesection of intervals
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8
Views
362
mathmari
mathmari
P
Trouble with understanding section of FOL completeness proof
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1
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230
Evgeny.Makarov
E
P
First-order logic formula satisfiable only if the domain of the valuation is infinite?
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2
Views
274
pooj4
P
mathmari
Statements about the set 2^M
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5
Views
362
topsquark
topsquark
mathmari
[SOLVED] Sets so that the cartesian product is commutative
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2
Views
261
mathmari
mathmari
P
Proving in first order logic for some arbitrary valuations of sigma in Machover's text
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1
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273
Evgeny.Makarov
E
mathmari
[SOLVED] Induction: Each square can be covered by L-stones
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5
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293
mathmari
mathmari
Z
Help proving prime and permutation
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1
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189
Klaas van Aarsen
Klaas van Aarsen
J
A Subset of a Graph with No Perfect Matching
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1
Views
298
joypav
J
V
first state whether it can be solved using the Master Theorem, and if it can then use that. Otherwis
Replies
1
Views
361
HallsofIvy
H
G
sequence - inhomogeneous recursion
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2
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332
goohu
G
mathmari
Prime implicants and disjunctive minimal form
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6
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509
Klaas van Aarsen
Klaas van Aarsen
C
Topology Munkres Chapter 1 exercise 2 e- Set theory
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3
Views
487
Evgeny.Makarov
E
C
Topology Munkres Chapter 1 exercise 2 b and c- Set theory equivalent statements
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1
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387
Euge
Euge
S
How to prove the equality?
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1
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411
Cbarker1
C
L
Do Gödel numbers can be used to derermine the usefulness of an infinite set as a complete whole?
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0
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240
Line
L
Y
Cartesian Product - Proof
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5
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2K
Olinguito
Olinguito
mathmari
Are the questions decidable?
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1
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715
Evgeny.Makarov
E
Y
Operations on sets
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2
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441
HallsofIvy
H
mathmari
Are the instances of PCP solvable?
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0
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308
mathmari
mathmari
mathmari
Linear Codes : Error detection
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0
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296
mathmari
mathmari
H
Number of ways to divide a square grid in half
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3
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1K
Opalg
Opalg
A
Help with proof of equivalence
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1
Views
430
Evgeny.Makarov
E
S
Discrete maths problem - tracing an algorithm
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3
Views
445
Ackbach
Ackbach
mathmari
[SOLVED] Karnaugh Diagram
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22
Views
2K
mathmari
mathmari
mathmari
Quine-McCluskey method: Prime implicants - disjunctive minimal forms
Replies
3
Views
402
Klaas van Aarsen
Klaas van Aarsen
D
Stuck on Derivation (Natural Deduction)
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1
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340
Evgeny.Makarov
E
K
Intro to Logic (prove sequents)
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1
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375
Evgeny.Makarov
E
mathmari
Two-element Boolean algebra: How are the equalities derived?
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13
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1K
Klaas van Aarsen
Klaas van Aarsen
E
isomorphism of logic, arithmetic, and set theory
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2
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1K
Eric
E
J
Predicate Logic: Semantics and Validity
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1
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2K
Evgeny.Makarov
E
D
Mathematical Induction
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1
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890
Olinguito
Olinguito
M
prove primitive recursive
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6
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2K
Evgeny.Makarov
E
G
Set Identity Proof
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1
Views
508
Evgeny.Makarov
E
C
Equivalence Class
Replies
1
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518
GJA
G
C
[SOLVED] Set Theory
Replies
1
Views
518
Olinguito
Olinguito
A
Basic arithmetic proof
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1
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467
Evgeny.Makarov
E
L
KE Deduction
Replies
3
Views
759
Evgeny.Makarov
E
H
set / class
Replies
1
Views
389
castor28
castor28
V
Can a given basis of a vector space (V,O_1,O_2) can it represent two different graphs
Replies
2
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452
vs140580
V
L
Truth Table Precedence
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5
Views
776
Evgeny.Makarov
E
J
Resolution method and counterexample
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0
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2K
joonteee
J
Q
Symmetrical group
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1
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503
Olinguito
Olinguito
Q
Divisibility Problem
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3
Views
714
Evgeny.Makarov
E
F
Transfinite induction
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1
Views
437
Country Boy
C
S
proper sub set
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1
Views
462
joypav
J
H
Discrete Mathematics - Define a relation R on S of at least four order pairs
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1
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434
Olinguito
Olinguito
S
Q: Let S = {1,2,5,6 } Define a relation R on S of at least four order pairs, as (a,b)  R iff a*b is
Replies
3
Views
914
Evgeny.Makarov
E
C
Find a recursive formula for the number of combinations
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3
Views
688
Opalg
Opalg
S
Q: Let S = {x, y, z } and R is a relation defined on S such that?
Replies
0
Views
596
sMilips
S
C
Recursive definition and induction
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0
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1K
CStudent
C
C
Some fundamental question in combinatorics
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6
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711
CStudent
C
C
Stars and bars selection
Replies
7
Views
641
Klaas van Aarsen
Klaas van Aarsen
C
Count the arrangements
Replies
1
Views
361
Evgeny.Makarov
E
T
Proof by induction - Really confused
Replies
4
Views
625
Tvtakaveli
T
L
Equivalence Relations Problem! Please help?
Replies
1
Views
393
Evgeny.Makarov
E
T
Predicates and Quanitifiers - Can't understand Question
Replies
3
Views
1K
Evgeny.Makarov
E
M
Inequality of Cardinality of Sets
Replies
4
Views
816
MaryAnn
M
M
Set Equivalence Problem
Replies
9
Views
930
Evgeny.Makarov
E
S
Functions and relations
Replies
1
Views
470
Evgeny.Makarov
E
ranga519
Functions problem
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1
Views
682
Country Boy
C
mathmari
Description of sets
Replies
5
Views
710
Klaas van Aarsen
Klaas van Aarsen
mathmari
Countable sets
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11
Views
1K
Country Boy
C
mathmari
Circle : squares - fuel
Replies
20
Views
2K
Klaas van Aarsen
Klaas van Aarsen
mathmari
Handshake Problem - Machines
Replies
5
Views
558
Wilmer
W
S
Converse, Contrapositive and Negation for multiple Quantifiers
Replies
1
Views
602
castor28
castor28
Peter
Ordinals ... Searcoid, Theorem 1.4.6 ...
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0
Views
463
Peter
Peter
Peter
Ordinals ... Searcoid, Corollary 1.4.5 ... ...
Replies
0
Views
463
Peter
Peter
Peter
Proper Subsets of Ordinals ... ... Another Question ... ... Searcoid, Theorem 1.4.4 ... ...
Replies
2
Views
424
Peter
Peter
U
Compound Proposition Simplification
Replies
4
Views
1K
steenis
S
Peter
Proper Subsets of Ordinals ... ... Searcoid, Theorem 1.4.4 ... ...
Replies
0
Views
312
Peter
Peter
Peter
Well Orders and Total Orders ... Searcoid Definition 1.3.10 ...
Replies
5
Views
858
Peter
Peter
Peter
Properties of the Ordinals ...
Replies
1
Views
404
Peter
Peter
Peter
The Recursion Theorem ... Searcoid, Theroem 1.3.24 ... ...
Replies
1
Views
498
Peter
Peter
mathmari
[SOLVED] Convert the recursive formula into the explicit form
Replies
16
Views
2K
mathmari
mathmari
C
Math induction with sigma notation
Replies
5
Views
665
Country Boy
C
A
Help with logic proof
Replies
1
Views
416
Country Boy
C
mathmari
[SOLVED] Number of rearrangements of letters
Replies
6
Views
735
mathmari
mathmari
A
Negation of nested quantifiers
Replies
4
Views
816
agapito
A
mathmari
[SOLVED] Number of edges of the graph
Replies
4
Views
592
mathmari
mathmari
evinda
Number of spanning trees
Replies
11
Views
1K
evinda
evinda
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