Theorem 4.1. if r, s € R and r

n,s∈R and n<s Now, s-n>0. By Archimedean property of R, there exists a natural number n such…

Answered: Theorem 4.1. if r, s ER and r

Linear Algebra: A Modern Introduction

4th Edition

ISBN:9781285463247

Author:David Poole

Publisher:David Poole

Chapter3: Matrices

Section3.2: Matrix Algebra

Problem 21EQ: Prove the half of Theorem 3.3 (e) that was not proved in the text.

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Similar questions

Prove that if m0 and (a,b) exists, then (ma,mb)=m(a,b).
Prove that if , , and , then .
1. Suppose that, in Example 2.27, 400 units of food A, 600 units of B, and 600 units of C are placed in the test tube each day and the data on daily food consumption by the bacteria (in units per day) are as shown in Table 2.6. How many bacteria of each strain can coexist in the test tube and consume all of the food? Table 2.6 Bacteria Strain I Bacteria Strain II Bacteria Strain III Food A 1 2 0 Food B 2 1 1 Food C 1 1 2
Prove or disprove that AB=AC implies B=C.
Prove the half of Theorem 3.3 (e) that was not proved in the text.
11. (See Exercise 10.) According to Definition 5.29, is defined in by if and only if . Show that if and only if . 10. An ordered field is an ordered integral domain that is also a field. In the quotient field of an ordered integral domain define by . Prove that is a set of positive elements for and hence, that is an ordered field. Definition 5.29 Greater than Let be an ordered integral domain with as the set of positive elements. The relation greater than, denoted by is defined on elements and of by if and only if . The symbol is read “greater than.” Similarly, is read “less than.” We define if and only if. As direct consequences of the definition, we have if and only if and if and only if . The three properties of in definition 5.28 translate at once into the following properties of in . If and then . If and then . For each one and only one of the following statements is true: . The other basic properties of are stated in the next theorem. We prove the first two and leave the proofs of the others as exercises.
Prove that the cancellation law for multiplication holds in Z. That is, if xy=xz and x0, then y=z.

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