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
7K
Ackbach
Ackbach
evinda
Construct circuit that implements truth table
2
Replies
26
Views
118
Klaas van Aarsen
Klaas van Aarsen
A
Question about Successor Function
Replies
0
Views
22
agapito
A
M
Binomial problem.
Replies
3
Views
54
Jameson
Jameson
evinda
Truth tables
Replies
2
Views
62
evinda
evinda
evinda
Find truth value of propositions
Replies
17
Views
80
evinda
evinda
A
Godelian self-reference
Replies
0
Views
100
agapito
A
E
Rules of inference
Replies
2
Views
260
Alan
A
E
proofs with real numbers
Replies
8
Views
140
HallsofIvy
H
D
Symbolic logic
Replies
1
Views
253
HallsofIvy
H
P
Please help with bool algebra and logic things!
Replies
2
Views
370
Evgeny.Makarov
E
F
Introduction to Set Theory Stream
Replies
1
Views
213
Klaas van Aarsen
Klaas van Aarsen
J
Probability of Having a Totally Dominating Set (Probabilistic Methods)
Replies
1
Views
488
joypav
J
J
Minimum Degree of a Random Graph (Probabilistic Method)
Replies
1
Views
330
joypav
J
J
Turans Theorem (Dual?)
Replies
1
Views
249
joypav
J
mathmari
[SOLVED] Give a set and a relation that satisfies the properties
Replies
10
Views
624
mathmari
mathmari
mathmari
Hilbert's hotel and busses : Injectivity - Surjectivity
Replies
7
Views
599
Klaas van Aarsen
Klaas van Aarsen
J
Find Proofs for the following 5 propositional logic statements
Replies
1
Views
498
HallsofIvy
H
Julio
Bipartite graphs
Replies
0
Views
310
Julio
Julio
mathmari
Show that ~ is an equivalence relation
Replies
2
Views
305
Evgeny.Makarov
E
mathmari
[SOLVED] Intesection of intervals
Replies
8
Views
358
mathmari
mathmari
P
Trouble with understanding section of FOL completeness proof
Replies
1
Views
224
Evgeny.Makarov
E
P
First-order logic formula satisfiable only if the domain of the valuation is infinite?
Replies
2
Views
268
pooj4
P
mathmari
Statements about the set 2^M
Replies
5
Views
358
topsquark
topsquark
mathmari
[SOLVED] Sets so that the cartesian product is commutative
Replies
2
Views
256
mathmari
mathmari
P
Proving in first order logic for some arbitrary valuations of sigma in Machover's text
Replies
1
Views
267
Evgeny.Makarov
E
mathmari
[SOLVED] Induction: Each square can be covered by L-stones
Replies
5
Views
289
mathmari
mathmari
Z
Help proving prime and permutation
Replies
1
Views
185
Klaas van Aarsen
Klaas van Aarsen
J
A Subset of a Graph with No Perfect Matching
Replies
1
Views
294
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
357
HallsofIvy
H
G
sequence - inhomogeneous recursion
Replies
2
Views
326
goohu
G
mathmari
Prime implicants and disjunctive minimal form
Replies
6
Views
505
Klaas van Aarsen
Klaas van Aarsen
C
Topology Munkres Chapter 1 exercise 2 e- Set theory
Replies
3
Views
482
Evgeny.Makarov
E
C
Topology Munkres Chapter 1 exercise 2 b and c- Set theory equivalent statements
Replies
1
Views
382
Euge
Euge
S
How to prove the equality?
Replies
1
Views
408
Cbarker1
C
L
Do Gödel numbers can be used to derermine the usefulness of an infinite set as a complete whole?
Replies
0
Views
235
Line
L
Y
Cartesian Product - Proof
Replies
5
Views
2K
Olinguito
Olinguito
mathmari
Are the questions decidable?
Replies
1
Views
710
Evgeny.Makarov
E
Y
Operations on sets
Replies
2
Views
437
HallsofIvy
H
mathmari
Are the instances of PCP solvable?
Replies
0
Views
302
mathmari
mathmari
mathmari
Linear Codes : Error detection
Replies
0
Views
291
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
423
Evgeny.Makarov
E
S
Discrete maths problem - tracing an algorithm
Replies
3
Views
439
Ackbach
Ackbach
mathmari
[SOLVED] Karnaugh Diagram
Replies
22
Views
2K
mathmari
mathmari
mathmari
Quine-McCluskey method: Prime implicants - disjunctive minimal forms
Replies
3
Views
395
Klaas van Aarsen
Klaas van Aarsen
D
Stuck on Derivation (Natural Deduction)
Replies
1
Views
333
Evgeny.Makarov
E
K
Intro to Logic (prove sequents)
Replies
1
Views
367
Evgeny.Makarov
E
mathmari
Two-element Boolean algebra: How are the equalities derived?
Replies
13
Views
1K
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
2K
Evgeny.Makarov
E
D
Mathematical Induction
Replies
1
Views
887
Olinguito
Olinguito
M
prove primitive recursive
Replies
6
Views
2K
Evgeny.Makarov
E
G
Set Identity Proof
Replies
1
Views
502
Evgeny.Makarov
E
C
Equivalence Class
Replies
1
Views
512
GJA
G
C
[SOLVED] Set Theory
Replies
1
Views
513
Olinguito
Olinguito
A
Basic arithmetic proof
Replies
1
Views
462
Evgeny.Makarov
E
L
KE Deduction
Replies
3
Views
753
Evgeny.Makarov
E
H
set / class
Replies
1
Views
383
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
447
vs140580
V
L
Truth Table Precedence
Replies
5
Views
771
Evgeny.Makarov
E
J
Resolution method and counterexample
Replies
0
Views
2K
joonteee
J
Q
Symmetrical group
Replies
1
Views
496
Olinguito
Olinguito
Q
Divisibility Problem
Replies
3
Views
709
Evgeny.Makarov
E
F
Transfinite induction
Replies
1
Views
431
Country Boy
C
S
proper sub set
Replies
1
Views
456
joypav
J
H
Discrete Mathematics - Define a relation R on S of at least four order pairs
Replies
1
Views
428
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
909
Evgeny.Makarov
E
C
Find a recursive formula for the number of combinations
Replies
3
Views
682
Opalg
Opalg
S
Q: Let S = {x, y, z } and R is a relation defined on S such that?
Replies
0
Views
590
sMilips
S
C
Recursive definition and induction
Replies
0
Views
1K
CStudent
C
C
Some fundamental question in combinatorics
Replies
6
Views
703
CStudent
C
C
Stars and bars selection
Replies
7
Views
635
Klaas van Aarsen
Klaas van Aarsen
C
Count the arrangements
Replies
1
Views
354
Evgeny.Makarov
E
T
Proof by induction - Really confused
Replies
4
Views
618
Tvtakaveli
T
L
Equivalence Relations Problem! Please help?
Replies
1
Views
386
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
811
MaryAnn
M
M
Set Equivalence Problem
Replies
9
Views
924
Evgeny.Makarov
E
S
Functions and relations
Replies
1
Views
464
Evgeny.Makarov
E
ranga519
Functions problem
Replies
1
Views
677
Country Boy
C
mathmari
Description of sets
Replies
5
Views
705
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
553
Wilmer
W
S
Converse, Contrapositive and Negation for multiple Quantifiers
Replies
1
Views
597
castor28
castor28
Peter
Ordinals ... Searcoid, Theorem 1.4.6 ...
Replies
0
Views
458
Peter
Peter
Peter
Ordinals ... Searcoid, Corollary 1.4.5 ... ...
Replies
0
Views
457
Peter
Peter
Peter
Proper Subsets of Ordinals ... ... Another Question ... ... Searcoid, Theorem 1.4.4 ... ...
Replies
2
Views
419
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
305
Peter
Peter
Peter
Well Orders and Total Orders ... Searcoid Definition 1.3.10 ...
Replies
5
Views
852
Peter
Peter
Peter
Properties of the Ordinals ...
Replies
1
Views
397
Peter
Peter
Peter
The Recursion Theorem ... Searcoid, Theroem 1.3.24 ... ...
Replies
1
Views
493
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
659
Country Boy
C
A
Help with logic proof
Replies
1
Views
411
Country Boy
C
mathmari
[SOLVED] Number of rearrangements of letters
Replies
6
Views
728
mathmari
mathmari
A
Negation of nested quantifiers
Replies
4
Views
812
agapito
A
mathmari
[SOLVED] Number of edges of the graph
Replies
4
Views
586
mathmari
mathmari
evinda
Number of spanning trees
Replies
11
Views
1K
evinda
evinda
You must log in or register to post here.