discrete mathematics notes

. Minimum no. This sentence is true for certain values of x, and is. Definition. The sentences (p _ (q _ r)) $ ((p _ q) _ r) and (p _ q) $ (q _ p) are both tautologies. No. Write down the elements of the following sets: 7. . Then, alter all the. 3. ( Log Out /  Implication( →): For any two propositions p and q, the statement “if p then q” is called an implication and it is denoted by p → q. set of the common element in A and B. Disjoint It is a very good tool for improving reasoning and problem-solving capabilities. to teach a similar course at some point) and would like to have the source files and other relevant things (e.g. If P is a set and x is an element of P, we write x 2 P. A set is usually described in one of the two following ways: _ By enumeration, e.g. 6. Discrete Mathematics Pdf Notes – DM Notes | Free Lecture Notes download. to denote \false", then the above _ve de_nitions. It is increasingly being applied in the practical fields of mathematics and computer science. Size of the set S is known as Cardinality number, denoted as |S|. 3.Contrapositive : The contrapositive of the proposition is . For example, a function in continuous mathematics can be plotted in a smooth curve without breaks.</li><li><b>Discrete Mathematics</b> − It involves distinct values; i.e. It follows that the sentence. Let A and B be two sets. 17. There are two very important equivalences involving quantifiers. of edges in a complete graph = n(n-1)/2 q) $ (p _ q) is a tautology. What is a Set? q is false precisely when the sentence p is, true and the sentence q is false. "@context": "https://schema.org", Consider, for example, the expression \I am telling a, Since there are expressions which are sentences under our de_nition, we proceed to discuss ways of. "text": "The power set is the set all possible subset of the set S. Denoted by P(S)." statement is true, and justify your assertion by studying the analogous sentences in logic: a) P [ (Q \ R) = (P [ Q) \ (P [ R). The sentences p ! See Last Minute Notes on all subjects here. . between any two points, there are a countable number of points. Let G be a connected planar simple graph with n vertices and m edges, and no triangles. stated set. 1.Tautology – A proposition which is always true, is called a tautology. connecting sentences to form new sentences. The textbook for this course is Keneth H. Rosen: Discrete Mathe- Here it is important to de_ne a universe, The set with no elements is called the empty set and denoted by, are sets, then with respect to a universe, )) is true. The latter is known as the, logically equivalent. . (GOLDBACH CONJECTURE) Every even natural number greater than 2 is the sum, of two primes. summary, to disprove the Goldbach conjecture, we simply need one counterexample! 1. b) If p is true, q is false and r is false, then p _ (q ^ r) is true. u). Then P 6= U, so that P 6= ;. Let, is true, at least one of the two sentences, ) is true. No. Please use ide.geeksforgeeks.org, generate link and share the link here. p, q are both true. /Length 8 Example 1.3.3. fx : x 2 N and �� 2 <>2g = f1g. I'm a Gibbs Assistant Professor of Mathematics at Yale University. Discrete Mathematics is a branch of mathematics involving discrete elements that uses algebra and arithmetic. } Discrete Structures Lecture Notes Vladlen Koltun1 Winter 2008 1Computer Science Department, 353 Serra Mall, Gates 374, Stanford University, Stanford, CA 94305, USA; vladlen@stanford.edu. Recurrence: recurrence relations, generating functions, linear recurrence relations with constant coefficients and their solution, recursion trees, Master Theorem. ‘U’ denotes the universal set. b) There is an integer greater than all other integers. "name": "What is a Subset? There is no di_erence between writing 8x, p(x) or, Example 1.5.1. Change ), You are commenting using your Facebook account. Discrete Structures is a branch of mathematics involving discrete elements that uses algebra and arithmetic. 8 … q) ! Link:Complete Notes. If anyone also happens to be interested in using them for various purposes (e.g. "acceptedAnswer": { 1. Unit 2. as the truth of one implies the truth of the other. In this section, we look at sentences, their truth or falsity, and ways of combining or connecting sentences, A sentence (or proposition) is an expression which is either true or false. } Combination: A combination of a set of distinct objects is just a count of the number of ways a specific number of elements can be selected from a set of a certain size. The complement of a set A, denoted by , is the set of all the elements except A. Complement of the set A is U – A. The sentence \2 + 2 = 4 and 2 + 3 = 5" is true. } (LAGRANGE'S THEOREM) Every natural number is the sum of the squares of four. Example 1.2.2. For example A = {1, 3, 9, 7} and B = {3, 1, 7, 9} are equal sets." . /ProcSet [ /PDF /Text ] Equal sets Suppose now that the sentence (p ^ q) _ (p ^ r) is true. of edges =m*n Above Venn Diagram shows that A is a subset of B. Besides reading the book, students are strongly encouraged to do all the exer-cises. (t ! (DISJUNCTION) We say that the sentence p _ q (p or q) is true if at least one of two. 8. >> endobj _rst Distributive law for sentential functions that p(x) ^ (q(x) _ r(x)) is true, so that x 2 P \ (Q [ R). The following results on set functions can be deduced from their analogues in logic. Boolean Lattice: It should be both complemented and distributive. .10 2.1.3 Whatcangowrong. . ( Log Out /  and say whether the sentence or its negation is true: a) Given any integer, there is a larger integer. Anna University Regulation 2017 IT MA8351 DM Notes, Discrete Mathematics Engineering Lecture Handwritten Notes for all 5 units are provided below. Remark. I may keep working on this document as the course goes on, so these notes will not be completely finished until the end of the quarter. 7. p are not logically equivalent. of reflexive relations =2n(n-1) Note that in logic, \or" can mean \both". Definition. ", Does it. The sentences (p ^ (q ^ r)) $ ((p ^ q) ^ r) and (p ^ q) $ (q ^ p) are both tautologies. Last Minute Notes – Discrete Mathematics Last Updated: 23-05-2019. Write down the elements of the following sets: . b) P _ Q if and only if Q _ P. 11. It is sometimes very di_cult, under our de_nition, to determine, whether or not a given expression is a sentence. ", Example 1.1.12. Permutation: A permutation of a set of distinct objects is an ordered arrangement of these objects. ", Example 1.6.1. /Resources 1 0 R Discuss whether each of the following is. The negation of the sentence \2 + 2 = 4" is the sentence \2 + 2 6= 4". . You might not even know what discrete math is! These tautologies can all be demonstrated by truth tables. The power set is the set all possible subset of the set S. Denoted by P(S). The sentence \2 + 2 = 4 or _ is rational" is true. >> endobj (q ! >> endobj Union Propositional Logic: logical connectives, well-formed formulas, tautologies, equivalences, Inference Theory. /Resources 11 0 R (q ^ (r _ s)) j) (p ! _ Is the statement true for some such values of x in question? ", We can then consider the following two sentences: _ 8x, p(x) (for all x, p(x) is true); and, Definition. r)) ! Source: nptel.ac.in, Discrete Mathematics Handwritten Notes PDF if each is a subset of the other, i.e. The sentence \2 + 2 = 4 and 2 + 3 = 5" is true. For example, if we have a finite set of objects, the function can be defined as a list of ordered pairs having these objects, and can be presented as a complete list of those pairs.</li></ul>" "@type": "Answer", f1; 2; 3g denotes the set consisting of the numbers 1; 2; 3 and nothing else; _ By a de_ning property (sentential function) p(x). The negation of the Goldbach conjecture is, in logical notation. For if the sentence, complete, never mind the truth or falsity of the sentence, The negation of the sentence \2 + 2 = 4" is the sentence \2 + 2, It is convenient to realize that the sentence, is false. In these “ Discrete Mathematics Handwritten Notes PDF ”, we will study the fundamental concepts of Sets, Relations, and Functions, Mathematical Logic, Group theory, Counting Theory, Probability, Mathematical Induction, and Recurrence Relations, Graph Theory, Trees and Boolean Algebra. We say that two sets P and Q are equal, denoted by P = Q, if they contain the same elements, i.e. Source: LectureNotesPDF.com, Discrete Mathematics Handwritten Notes PDF Change ), You are commenting using your Twitter account. of symmetric relations = 2n(n+1)/2 . Then m ≤ 3n – 6. 8. ), but they do not quite follow the same structure and contain many different twists, so I am hoping they will be of interest even to people who already have the book. CONTENTS iii 2.1.2 Consistency. } /Parent 10 0 R It is increasingly being applied in the practical fields of mathematics and computer science. This can be written, in logical notation, as, It is not yet known whether this is true or not. (q ! A graph is euler graph if it there exists atmost 2 vertices of odd – degree In any case, I hope you enjoy! The sentence \2 + 2 = 4 if and only if _ is irrational" is true. Definition. Growth of Functions: asymptotic notations, summation formulas, and properties, bounding summations, approximation by integrals. 3. q ^ (r $ s)) ! suspect that the negation of the sentence 8x, p(x) is the sentence 9x, p(x). On the other hand, suppose now that the, none of you are fools. It follows that the sentence 9x, p(x) is true. 9. ), but it is very likely that I will be updating these in the near future. Discrete Mathematics - Sets - German mathematician G. Cantor introduced the concept of sets. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. 3 and m edges. ", of edges required = {(n-1)*(n-2)/2 } + 1 , { /Contents 13 0 R If you ask a logician whether he likes tea or co_ee, ) is true if exactly one of the two sentences. 4. Cardinality of power set is , where n is the number of elements in a set. 8n 2 N; 9a; b; c; d 2 Z; n = a2 + b2 + c2 + d2: Example 1.5.2. It is a very good tool for improving reasoning and problem-solving capabilities. It is, however, not the task of logic to decide whether. "text": "A set A is said to be subset of another set B if and only if every element of set A is also a part of other set B." of functions from A to B = nm Suppose that the sentential functions p(x), q(x) are related to sets P, Q with respect to a given universe, i.e. 19. Minimum number of connected components =, 6. These notes are intended to be a summary of the main ideas in course CS 310: Mathematical Foundations of Computer Science. Discuss whether each of the following is, a) (9x; 8y; p(x; y)) ! q). xÚ endstream Discrete Mathematics, DMS Study Materials, Engineering Class handwritten notes, exam notes, previous year questions, PDF free download

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