Recent questions in Discrete Mathematics

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1 answer

1

TESTBOOK TEST

asked 6 hours ago in Set Theory & Algebra by Koushik Sinha 2 (13 points) | 5 views

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1 answer

2

Rosen
How can this English sentence be translated into a logical expression ? “You cannot ride the roller coaster if you are under 4 feet tall unless you are older than 16 years old.”

asked 2 days ago in Mathematical Logic by set2018 (73 points) | 15 views

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0 answers

3

Diameter of a graph and tree
Why there is a difference between diameter of a graph and tree? Diameter of a tree as i have read is the maximum path between two vertices(number of edges between two vertices) But for tree it says number of nodes on the longest path. But tree is a graph so why cant i find the diameter of tree in similar way?

asked 2 days ago in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 7 views

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1 answer

4

Self - Doubt
What is clique?

asked 3 days ago in Graph Theory by Arnab Bhadra Loyal (3.1k points) | 14 views

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1 answer

5

#combinatory
Determine the number of factors of 34 * 52 * * 117 * 138.

asked 3 days ago in Combinatory by Nachiket Karambelkar (165 points) | 42 views

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0 answers

6

[Discrete Maths] Generating functions

asked 3 days ago in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 51 views

+1 vote

1 answer

7

[Discrete maths] Exponent generating function

asked 3 days ago in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 23 views

0 votes

1 answer

8

[Discrete Maths] predicate Logic

asked 4 days ago in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 39 views

+1 vote

1 answer

9

General Math
Why is $n \leq 2^{h+1} - 1$ equivalent to $h \geq \log_2{\frac{n+1}{2}}$ ? This is applicable to Binary Trees

asked 4 days ago in Graph Theory by kauray (269 points) | 28 views

0 votes

2 answers

10

discrete mathematics , group theory

asked 4 days ago in Set Theory & Algebra by Ashish Mishra 4 (45 points) | 27 views

0 votes

1 answer

11

Testbook test series

asked 5 days ago in Mathematical Logic by shefali1 Junior (527 points) | 35 views

+1 vote

1 answer

12

Testbook testseries

asked 5 days ago in Mathematical Logic by shefali1 Junior (527 points) | 30 views

0 votes

0 answers

13

[Self doubt] Permutation
Default permutation is with repetition or not?I came across some questions and it was nothing mentioned like repetition and all.But if questions says how many passwords then it was assumed that they are distinct and repetition not allowed ... by 4 digits etc. and in these question it was with repitiion.So how to differentiate between these two?

asked 5 days ago in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 18 views

0 votes

1 answer

14

Rosen #MATHEMATICAL LOGIC
Chapter 1 Exercise1.4 question 9.h Let L(x, y) be the statement "x loves y" where the domain of x and y consist of all people of the world. Use quantifiers to expess the statement : "THERE ARE EXACTLY TWO PEOPLE WHOM LYNN LOVES"

asked 6 days ago in Mathematical Logic by chetan raghav (19 points) | 21 views

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1 answer

15

Set theory
{ a } ∈ A but a ∉ A why ? here ' a is the element of set {a} ' ,and ' set {a} is the element of A" , so " a also element of A " . please clear my doubt .

asked 6 days ago in Set Theory & Algebra by ram_18051996 (89 points) | 32 views

0 votes

2 answers

16

[Discrete Maths] Group Theory
If the group has 40 elements and it has two subgroups namely h and k with order 10 and 20 then what can't be order of (h intersection k) a:)10 b:)20 c:)3 d:)1 e:) 4 My answer is both c and b and e. Is it correct?

asked Jun 15 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 23 views

0 votes

1 answer

17

[Discrete Maths] Dual of a function

asked Jun 15 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 26 views

0 votes

0 answers

18

[Discrete Maths] First Order Logic

asked Jun 15 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 27 views

+1 vote

1 answer

19

[Discrete Maths] predicate Logic

asked Jun 15 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 35 views

0 votes

2 answers

20

[Discrete Maths] predicate logic

asked Jun 14 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 23 views

0 votes

2 answers

21

Counting
How many ways are there to put six temporary employees into four labeled offices so that there is at least one temporary employee in each of these four offices?

asked Jun 14 in Mathematical Logic by reena_kandari Loyal (2.6k points) | 31 views

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0 answers

22

[Discrete maths ] Group theory
Let G be abelian, H and K subgroups of G with orders n, m. Then G has subgroup of order lcm(n,m) I have gone through prrof here:- https://math.stackexchange.com/questions/465742/let-g-be-abelian-h-and-k- ... true. there are some existing examples where n divides G but there is no subgroup with that order.Please clear with explanation.

asked Jun 13 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 21 views

0 votes

1 answer

23

first order logic notations
can someone please tell when to interpret this symbol $\Leftrightarrow$ as logical equivalence and when as double implication?

asked Jun 13 in Mathematical Logic by vineet.ildm (321 points) | 38 views

0 votes

3 answers

24

[Discrete Maths] Graph Theory Rosen,Chromatic number

asked Jun 13 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 35 views

0 votes

0 answers

25

[Discrete Maths] Hamilton Circuit,Rosen p-584,q47

asked Jun 13 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 20 views

+1 vote

1 answer

26

Discrete Maths Graph theory
What are the necessary and sufficient conditions for Euler path and Circuit in directed graph?

asked Jun 13 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 33 views

0 votes

0 answers

27

Discrete maths equivalence relation

asked Jun 12 in Mathematical Logic by rahul sharma 5 Loyal (4.8k points) | 18 views

0 votes

1 answer

28

FREE VARIABLE and VALIDITY related problem

asked Jun 12 in Mathematical Logic by ram_18051996 (89 points) | 13 views

0 votes

1 answer

29

# FREE VARIABLE ( NULL QUANTIFICATION ) Related problem

asked Jun 12 in Mathematical Logic by ram_18051996 (89 points) | 8 views

0 votes

1 answer

30

ISI2017 MMA
Let S ⊆ R. Consider the statement: "There exists a continuous function f:S -> S such that f(x) != x for all x belongs to S." This statement is false if S equals A) [2,3] B) (2,3] c) [-3,-2] union [2,3] D) (- ... to +infinity, f(x) will definitely be equal to x at some point but we want this to not happen as said in the question. Am I correct?

asked Jun 12 in Set Theory & Algebra by shraddha priya Junior (915 points) | 24 views

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