Welcome to our community

Be a part of something great, join today!

Register Log in

Discrete Mathematics, Set Theory, and Logic

Discrete Math, Graph Theory, Combinatorics, Recurrence Relations (Difference Equations), Set Theory, General and Symbolic Logic
chisigma
  • Sticky
Difference equation tutorial: draft of part II
Replies
2
Views
8K
chisigma
chisigma
chisigma
  • Sticky
Difference equation tutorial: draft of part I
Replies
3
Views
9K
chisigma
chisigma
Ackbach
  • Locked
  • Sticky
Please Read Before Posting Logic Questions
Replies
0
Views
8K
Ackbach
Ackbach
Furthark
Attempting to add logic mathematics to a college paper - need your input
Replies
2
Views
187
Furthark
Furthark
C
Pigeonhole Principle Problem
Replies
2
Views
134
Carl
C
F
Proof by induction? No Idea what I should do :(
Replies
4
Views
106
Opalg
Opalg
A
Question about Successor Function
Replies
2
Views
159
Evgeny.Makarov
E
E
proofs with real numbers
Replies
9
Views
338
Country Boy
C
M
Binomial problem.
Replies
4
Views
158
Country Boy
C
Peter
ZFC and the Axiom of Power Sets ...
Replies
2
Views
172
Peter
Peter
Dhamnekar Winod
[SOLVED] Sequences and series
Replies
3
Views
115
MarkFL
M
C
Discrete math can you solve immediately
Replies
0
Views
110
ceasertr
C
evinda
Construct grammar and find its type
2
Replies
26
Views
401
Klaas van Aarsen
Klaas van Aarsen
Julio
Bipartite graphs
Replies
1
Views
455
caffeinemachine
caffeinemachine
G
Euler's totient function
Replies
1
Views
168
GJA
G
mathmari
Optimal time for scheduling the tasks
Replies
1
Views
85
Klaas van Aarsen
Klaas van Aarsen
mathmari
Total weight of Huffman Code
Replies
1
Views
75
Klaas van Aarsen
Klaas van Aarsen
A
Help with a simple deduction
Replies
0
Views
75
agapito
A
evinda
Find the general formula of the recurrence relation
Replies
13
Views
171
evinda
evinda
evinda
Construct circuit that implements truth table
2
Replies
45
Views
512
evinda
evinda
evinda
Truth tables
Replies
2
Views
119
evinda
evinda
evinda
Find truth value of propositions
Replies
17
Views
175
evinda
evinda
A
Godelian self-reference
Replies
0
Views
167
agapito
A
E
Rules of inference
Replies
2
Views
351
Alan
A
D
Symbolic logic
Replies
1
Views
353
HallsofIvy
H
P
Please help with bool algebra and logic things!
Replies
2
Views
428
Evgeny.Makarov
E
F
Introduction to Set Theory Stream
Replies
1
Views
280
Klaas van Aarsen
Klaas van Aarsen
J
Probability of Having a Totally Dominating Set (Probabilistic Methods)
Replies
1
Views
546
joypav
J
J
Minimum Degree of a Random Graph (Probabilistic Method)
Replies
1
Views
379
joypav
J
J
Turans Theorem (Dual?)
Replies
1
Views
304
joypav
J
mathmari
[SOLVED] Give a set and a relation that satisfies the properties
Replies
10
Views
693
mathmari
mathmari
mathmari
Hilbert's hotel and busses : Injectivity - Surjectivity
Replies
7
Views
681
Klaas van Aarsen
Klaas van Aarsen
J
Find Proofs for the following 5 propositional logic statements
Replies
1
Views
583
HallsofIvy
H
mathmari
Show that ~ is an equivalence relation
Replies
2
Views
359
Evgeny.Makarov
E
mathmari
[SOLVED] Intesection of intervals
Replies
8
Views
463
mathmari
mathmari
P
Trouble with understanding section of FOL completeness proof
Replies
1
Views
281
Evgeny.Makarov
E
P
First-order logic formula satisfiable only if the domain of the valuation is infinite?
Replies
2
Views
348
pooj4
P
mathmari
Statements about the set 2^M
Replies
5
Views
419
topsquark
topsquark
mathmari
[SOLVED] Sets so that the cartesian product is commutative
Replies
2
Views
316
mathmari
mathmari
P
Proving in first order logic for some arbitrary valuations of sigma in Machover's text
Replies
1
Views
331
Evgeny.Makarov
E
mathmari
[SOLVED] Induction: Each square can be covered by L-stones
Replies
5
Views
351
mathmari
mathmari
Z
Help proving prime and permutation
Replies
1
Views
259
Klaas van Aarsen
Klaas van Aarsen
J
A Subset of a Graph with No Perfect Matching
Replies
1
Views
359
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
426
HallsofIvy
H
G
sequence - inhomogeneous recursion
Replies
2
Views
401
goohu
G
mathmari
Prime implicants and disjunctive minimal form
Replies
6
Views
594
Klaas van Aarsen
Klaas van Aarsen
C
Topology Munkres Chapter 1 exercise 2 e- Set theory
Replies
3
Views
562
Evgeny.Makarov
E
C
Topology Munkres Chapter 1 exercise 2 b and c- Set theory equivalent statements
Replies
1
Views
434
Euge
Euge
S
How to prove the equality?
Replies
1
Views
467
Cbarker1
C
L
Do Gödel numbers can be used to derermine the usefulness of an infinite set as a complete whole?
Replies
0
Views
299
Line
L
Y
Cartesian Product - Proof
Replies
5
Views
2K
Olinguito
Olinguito
mathmari
Are the questions decidable?
Replies
1
Views
779
Evgeny.Makarov
E
Y
Operations on sets
Replies
2
Views
506
HallsofIvy
H
mathmari
Are the instances of PCP solvable?
Replies
0
Views
375
mathmari
mathmari
mathmari
Linear Codes : Error detection
Replies
0
Views
343
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
480
Evgeny.Makarov
E
S
Discrete maths problem - tracing an algorithm
Replies
3
Views
539
Ackbach
Ackbach
mathmari
[SOLVED] Karnaugh Diagram
Replies
22
Views
2K
mathmari
mathmari
mathmari
Quine-McCluskey method: Prime implicants - disjunctive minimal forms
Replies
3
Views
465
Klaas van Aarsen
Klaas van Aarsen
D
Stuck on Derivation (Natural Deduction)
Replies
1
Views
393
Evgeny.Makarov
E
K
Intro to Logic (prove sequents)
Replies
1
Views
430
Evgeny.Makarov
E
mathmari
Two-element Boolean algebra: How are the equalities derived?
Replies
13
Views
2K
Klaas van Aarsen
Klaas van Aarsen
E
isomorphism of logic, arithmetic, and set theory
Replies
2
Views
1K
Eric
E
J
Predicate Logic: Semantics and Validity
Replies
1
Views
3K
Evgeny.Makarov
E
D
Mathematical Induction
Replies
1
Views
946
Olinguito
Olinguito
M
prove primitive recursive
Replies
6
Views
2K
Evgeny.Makarov
E
G
Set Identity Proof
Replies
1
Views
566
Evgeny.Makarov
E
C
Equivalence Class
Replies
1
Views
584
GJA
G
C
[SOLVED] Set Theory
Replies
1
Views
572
Olinguito
Olinguito
A
Basic arithmetic proof
Replies
1
Views
528
Evgeny.Makarov
E
L
KE Deduction
Replies
3
Views
807
Evgeny.Makarov
E
H
set / class
Replies
1
Views
440
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
509
vs140580
V
L
Truth Table Precedence
Replies
5
Views
822
Evgeny.Makarov
E
J
Resolution method and counterexample
Replies
0
Views
2K
joonteee
J
Q
Symmetrical group
Replies
1
Views
557
Olinguito
Olinguito
Q
Divisibility Problem
Replies
3
Views
778
Evgeny.Makarov
E
F
Transfinite induction
Replies
1
Views
493
Country Boy
C
S
proper sub set
Replies
1
Views
516
joypav
J
H
Discrete Mathematics - Define a relation R on S of at least four order pairs
Replies
1
Views
512
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
993
Evgeny.Makarov
E
C
Find a recursive formula for the number of combinations
Replies
3
Views
753
Opalg
Opalg
S
Q: Let S = {x, y, z } and R is a relation defined on S such that?
Replies
0
Views
644
sMilips
S
C
Recursive definition and induction
Replies
0
Views
1K
CStudent
C
C
Some fundamental question in combinatorics
Replies
6
Views
770
CStudent
C
C
Stars and bars selection
Replies
7
Views
701
Klaas van Aarsen
Klaas van Aarsen
C
Count the arrangements
Replies
1
Views
430
Evgeny.Makarov
E
T
Proof by induction - Really confused
Replies
4
Views
676
Tvtakaveli
T
L
Equivalence Relations Problem! Please help?
Replies
1
Views
451
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
872
MaryAnn
M
M
Set Equivalence Problem
Replies
9
Views
992
Evgeny.Makarov
E
S
Functions and relations
Replies
1
Views
517
Evgeny.Makarov
E
ranga519
Functions problem
Replies
1
Views
738
Country Boy
C
mathmari
Description of sets
Replies
5
Views
794
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
604
Wilmer
W
S
Converse, Contrapositive and Negation for multiple Quantifiers
Replies
1
Views
660
castor28
castor28
Peter
Ordinals ... Searcoid, Theorem 1.4.6 ...
Replies
0
Views
509
Peter
Peter
Peter
Ordinals ... Searcoid, Corollary 1.4.5 ... ...
Replies
0
Views
502
Peter
Peter
Peter
Proper Subsets of Ordinals ... ... Another Question ... ... Searcoid, Theorem 1.4.4 ... ...
Replies
2
Views
464
Peter
Peter
You must log in or register to post here.