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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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8K
Ackbach
Ackbach
Furthark
Attempting to add logic mathematics to a college paper - need your input
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2
Views
160
Furthark
Furthark
C
Pigeonhole Principle Problem
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2
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129
Carl
C
F
Proof by induction? No Idea what I should do :(
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4
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99
Opalg
Opalg
A
Question about Successor Function
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2
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153
Evgeny.Makarov
E
E
proofs with real numbers
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9
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336
Country Boy
C
M
Binomial problem.
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4
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155
Country Boy
C
Peter
ZFC and the Axiom of Power Sets ...
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2
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167
Peter
Peter
Dhamnekar Winod
[SOLVED] Sequences and series
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3
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110
MarkFL
M
C
Discrete math can you solve immediately
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0
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106
ceasertr
C
evinda
Construct grammar and find its type
2
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26
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387
Klaas van Aarsen
Klaas van Aarsen
Julio
Bipartite graphs
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1
Views
453
caffeinemachine
caffeinemachine
G
Euler's totient function
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1
Views
161
GJA
G
mathmari
Optimal time for scheduling the tasks
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1
Views
83
Klaas van Aarsen
Klaas van Aarsen
mathmari
Total weight of Huffman Code
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1
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72
Klaas van Aarsen
Klaas van Aarsen
A
Help with a simple deduction
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0
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73
agapito
A
evinda
Find the general formula of the recurrence relation
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13
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161
evinda
evinda
evinda
Construct circuit that implements truth table
2
Replies
45
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496
evinda
evinda
evinda
Truth tables
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2
Views
116
evinda
evinda
evinda
Find truth value of propositions
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17
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168
evinda
evinda
A
Godelian self-reference
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0
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164
agapito
A
E
Rules of inference
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2
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343
Alan
A
D
Symbolic logic
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1
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342
HallsofIvy
H
P
Please help with bool algebra and logic things!
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2
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424
Evgeny.Makarov
E
F
Introduction to Set Theory Stream
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1
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275
Klaas van Aarsen
Klaas van Aarsen
J
Probability of Having a Totally Dominating Set (Probabilistic Methods)
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1
Views
543
joypav
J
J
Minimum Degree of a Random Graph (Probabilistic Method)
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1
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375
joypav
J
J
Turans Theorem (Dual?)
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1
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299
joypav
J
mathmari
[SOLVED] Give a set and a relation that satisfies the properties
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10
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679
mathmari
mathmari
mathmari
Hilbert's hotel and busses : Injectivity - Surjectivity
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7
Views
676
Klaas van Aarsen
Klaas van Aarsen
J
Find Proofs for the following 5 propositional logic statements
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1
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576
HallsofIvy
H
mathmari
Show that ~ is an equivalence relation
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2
Views
351
Evgeny.Makarov
E
mathmari
[SOLVED] Intesection of intervals
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8
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454
mathmari
mathmari
P
Trouble with understanding section of FOL completeness proof
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1
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277
Evgeny.Makarov
E
P
First-order logic formula satisfiable only if the domain of the valuation is infinite?
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2
Views
341
pooj4
P
mathmari
Statements about the set 2^M
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5
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415
topsquark
topsquark
mathmari
[SOLVED] Sets so that the cartesian product is commutative
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2
Views
311
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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323
Evgeny.Makarov
E
mathmari
[SOLVED] Induction: Each square can be covered by L-stones
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5
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349
mathmari
mathmari
Z
Help proving prime and permutation
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1
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250
Klaas van Aarsen
Klaas van Aarsen
J
A Subset of a Graph with No Perfect Matching
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1
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355
joypav
J
V
first state whether it can be solved using the Master Theorem, and if it can then use that. Otherwis
Replies
1
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420
HallsofIvy
H
G
sequence - inhomogeneous recursion
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2
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396
goohu
G
mathmari
Prime implicants and disjunctive minimal form
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6
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585
Klaas van Aarsen
Klaas van Aarsen
C
Topology Munkres Chapter 1 exercise 2 e- Set theory
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3
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557
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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431
Euge
Euge
S
How to prove the equality?
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1
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459
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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294
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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775
Evgeny.Makarov
E
Y
Operations on sets
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2
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502
HallsofIvy
H
mathmari
Are the instances of PCP solvable?
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0
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367
mathmari
mathmari
mathmari
Linear Codes : Error detection
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0
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341
mathmari
mathmari
H
Number of ways to divide a square grid in half
Replies
3
Views
1K
Opalg
Opalg
A
Help with proof of equivalence
Replies
1
Views
477
Evgeny.Makarov
E
S
Discrete maths problem - tracing an algorithm
Replies
3
Views
532
Ackbach
Ackbach
mathmari
[SOLVED] Karnaugh Diagram
Replies
22
Views
2K
mathmari
mathmari
mathmari
Quine-McCluskey method: Prime implicants - disjunctive minimal forms
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3
Views
462
Klaas van Aarsen
Klaas van Aarsen
D
Stuck on Derivation (Natural Deduction)
Replies
1
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391
Evgeny.Makarov
E
K
Intro to Logic (prove sequents)
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1
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423
Evgeny.Makarov
E
mathmari
Two-element Boolean algebra: How are the equalities derived?
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13
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2K
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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3K
Evgeny.Makarov
E
D
Mathematical Induction
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1
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942
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
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564
Evgeny.Makarov
E
C
Equivalence Class
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1
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577
GJA
G
C
[SOLVED] Set Theory
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1
Views
571
Olinguito
Olinguito
A
Basic arithmetic proof
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1
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525
Evgeny.Makarov
E
L
KE Deduction
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3
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805
Evgeny.Makarov
E
H
set / class
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1
Views
436
castor28
castor28
V
Can a given basis of a vector space (V,O_1,O_2) can it represent two different graphs
Replies
2
Views
505
vs140580
V
L
Truth Table Precedence
Replies
5
Views
821
Evgeny.Makarov
E
J
Resolution method and counterexample
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0
Views
2K
joonteee
J
Q
Symmetrical group
Replies
1
Views
554
Olinguito
Olinguito
Q
Divisibility Problem
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3
Views
774
Evgeny.Makarov
E
F
Transfinite induction
Replies
1
Views
491
Country Boy
C
S
proper sub set
Replies
1
Views
513
joypav
J
H
Discrete Mathematics - Define a relation R on S of at least four order pairs
Replies
1
Views
509
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
985
Evgeny.Makarov
E
C
Find a recursive formula for the number of combinations
Replies
3
Views
750
Opalg
Opalg
S
Q: Let S = {x, y, z } and R is a relation defined on S such that?
Replies
0
Views
641
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
Views
764
CStudent
C
C
Stars and bars selection
Replies
7
Views
699
Klaas van Aarsen
Klaas van Aarsen
C
Count the arrangements
Replies
1
Views
423
Evgeny.Makarov
E
T
Proof by induction - Really confused
Replies
4
Views
673
Tvtakaveli
T
L
Equivalence Relations Problem! Please help?
Replies
1
Views
446
Evgeny.Makarov
E
T
Predicates and Quanitifiers - Can't understand Question
Replies
3
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1K
Evgeny.Makarov
E
M
Inequality of Cardinality of Sets
Replies
4
Views
869
MaryAnn
M
M
Set Equivalence Problem
Replies
9
Views
991
Evgeny.Makarov
E
S
Functions and relations
Replies
1
Views
514
Evgeny.Makarov
E
ranga519
Functions problem
Replies
1
Views
735
Country Boy
C
mathmari
Description of sets
Replies
5
Views
786
Klaas van Aarsen
Klaas van Aarsen
mathmari
Countable sets
Replies
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
602
Wilmer
W
S
Converse, Contrapositive and Negation for multiple Quantifiers
Replies
1
Views
654
castor28
castor28
Peter
Ordinals ... Searcoid, Theorem 1.4.6 ...
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0
Views
506
Peter
Peter
Peter
Ordinals ... Searcoid, Corollary 1.4.5 ... ...
Replies
0
Views
499
Peter
Peter
Peter
Proper Subsets of Ordinals ... ... Another Question ... ... Searcoid, Theorem 1.4.4 ... ...
Replies
2
Views
463
Peter
Peter
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