3. Create a script that creates an n x n matrix A with values 1 on the diagonal and 4 di-rectly above the diagonal, a vector b with n entries (all set to 1), and then time how longBackSubstitution takes with A and b by runningtic;x=BackSubstitution (A,b);tocfor the following values of n: 2000, 4000, 8000, 16000. Do you see what we expect fromlooking at the number of operations for back substitution from lecture?

A matrix is a two-dimensional data object made of m rows and n columns, therefore having total m x n…

Answered: tor b with n A and b by ru W. e

Engineering

Computer Science

tor b with n A and b by ru W. e

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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A university uses student numbers consisting of 6 digits plus a check digit in the 7th position. The check digit is found by taking the number formed by the first 6 digits modulo 7. A transposition in this setup is a switch of two adjacent digits - check digit excluded. Which transpositions of a student number (a6,a5,a4,a3,a2,a1,a0) (here written as a vector, with check digit a0) will not be detected by the check digit? Explain your answer in full and show any calculations you do. Hint: Note that the value of any ai in the number is ai×10i and consider the difference between the values of the correct and incorrect numbers modulo 7.
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