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Download e-book for iPad: Algorithms on Strings, Trees and Sequences - Computer by Dan Gusfield

By Dan Gusfield

Typically a space of analysis in laptop technological know-how, string algorithms have, lately, turn into an more and more very important a part of biology, really genetics. This quantity is a finished examine desktop algorithms for string processing. as well as natural laptop technological know-how, Gusfield provides vast discussions on organic difficulties which are solid as string difficulties and on tools built to resolve them. this article emphasizes the elemental rules and strategies critical to ultra-modern functions. New ways to this advanced fabric simplify equipment that during the past were for the expert by myself. With over four hundred workouts to augment the fabric and increase extra issues, the publication is acceptable as a textual content for graduate or complicated undergraduate scholars in laptop technological know-how, computational biology, or bio-informatics.

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Introduction and Basic Terminology 17 proof is constructed by considering two separate cases. Thus, one could argue for its inclusion in the section on Multiple Hypotheses! EXAMPLE 5. A five-digit number is divisible by 3 when the sum of its digits is divisible by 3. Discussion: This statement can be rewritten as: If the sum of the digits of a five digit number is divisible by 3, then the number is divisible by 3. A. Let n be an integer number with n = ±a4a3a2a\ao, 0 < a, < 9 for all i = 0, 1, 2, 3, 4, and (247^0, such that ^4+ ^3+ ^2 + ^1 + ^0 = 3t, where t is an integer number.

Let r and s be two counting numbers. The following statements are equivalent: i. r>s. ii. a^l. iii. d

28. Let p be a prime number. Then, ^ Proof: Let us assume that ^ r- • is an irrational number. is a rational number; that is, ^ 34 The Nuts and Bolts of Proof, Third Edition where ny^O,q^O, and n and q are integers, with the fraction written in reduced form. ) Therefore, n^ Thus, 2 2 n' = pq\ Because n^ is a multiple of p, which is a prime number, then n must be a multiple of p. ) Therefore, we can write n = pk for some positive integer k. This implies: ph^ = pq^ or pk' = q\ Because c^ is a multiple of p, which is a prime number, then ^ must be a multiple of p.

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Algorithms on Strings, Trees and Sequences - Computer Science and Computational Biology by Dan Gusfield


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