Difference between revisions of "Factors Command"
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− | <noinclude>{{Manual Page|version= | + | <noinclude>{{Manual Page|version=5.0}}</noinclude>{{command|cas=true|function}} |
− | {{command|cas=true|function}} | + | ;Factors( <Polynomial> ) |
− | ;Factors | ||
:Gives a list of lists of the type ''{factor, exponent}'' such that the product of all these factors raised to the power of the corresponding exponents equals the given polynomial. The factors are sorted by degree in ascending order. | :Gives a list of lists of the type ''{factor, exponent}'' such that the product of all these factors raised to the power of the corresponding exponents equals the given polynomial. The factors are sorted by degree in ascending order. | ||
− | :{{example| 1= | + | :{{example| 1=<code><nowiki>Factors(x^8 - 1)</nowiki></code> yields ''{{x - 1, 1}, {x + 1, 1}, {x^2 + 1, 1}, {x^4 + 1, 1}}''.}} |
:{{note| 1=Not all of the factors are irreducible over the reals.}} | :{{note| 1=Not all of the factors are irreducible over the reals.}} | ||
− | ;Factors | + | ;Factors( <Number> ) |
− | :Gives | + | :Gives matrix of the type <math>\left( \begin{array}{} prime_1 & exponent_1 \\ prime_2 & exponent_2 \\prime_3 & exponent_3 \\ \end{array} \right) </math> such that the product of all these primes raised to the power of the corresponding ''exponents'' equals the given number. The primes are sorted in ascending order. |
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:{{example|1=<div> | :{{example|1=<div> | ||
− | :* <code><nowiki>Factors | + | :* <code><nowiki>Factors(1024)</nowiki></code> yields ''<nowiki>( 2 10 )</nowiki>'', since <math>1024 = 2^{10}</math>. |
− | :* <code><nowiki>Factors | + | :* <code><nowiki>Factors(42)</nowiki></code> yields <math>\left( \begin{array}{} 2 & 1 \\ 3 & 1 \\7 & 1 \\ \end{array} \right) </math>, since <math>42 = 2^1・3^1・7^1</math>.</div>}} |
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{{note|See also [[PrimeFactors Command]] and [[Factor Command]].}} | {{note|See also [[PrimeFactors Command]] and [[Factor Command]].}} | ||
+ | <br> | ||
+ | {{note|1= | ||
+ | In the [[File:Menu view cas.svg|link=|16px]] [[CAS View]] undefined variables can be used as input and the results are returned as proper matrices. | ||
+ | :{{example| 1=<code><nowiki>Factors(a^8 - 1)</nowiki></code> yields <math>\left( \begin{array}{} a - 1 & 1 \\ a +1 & 1 \\a^2 + 1& 1 \\a^4 + 1& 1 \\ \end{array} \right)</math>.}} | ||
+ | }} |
Latest revision as of 09:17, 9 October 2017
- Factors( <Polynomial> )
- Gives a list of lists of the type {factor, exponent} such that the product of all these factors raised to the power of the corresponding exponents equals the given polynomial. The factors are sorted by degree in ascending order.
- Example:
Factors(x^8 - 1)
yields {{x - 1, 1}, {x + 1, 1}, {x^2 + 1, 1}, {x^4 + 1, 1}}.
- Note: Not all of the factors are irreducible over the reals.
- Factors( <Number> )
- Gives matrix of the type \left( \begin{array}{} prime_1 & exponent_1 \\ prime_2 & exponent_2 \\prime_3 & exponent_3 \\ \end{array} \right) such that the product of all these primes raised to the power of the corresponding exponents equals the given number. The primes are sorted in ascending order.
- Example:
Factors(1024)
yields ( 2 10 ), since 1024 = 2^{10}.Factors(42)
yields \left( \begin{array}{} 2 & 1 \\ 3 & 1 \\7 & 1 \\ \end{array} \right) , since 42 = 2^1・3^1・7^1.
Note: See also PrimeFactors Command and Factor Command.
Note: In the CAS View undefined variables can be used as input and the results are returned as proper matrices.
- Example:
Factors(a^8 - 1)
yields \left( \begin{array}{} a - 1 & 1 \\ a +1 & 1 \\a^2 + 1& 1 \\a^4 + 1& 1 \\ \end{array} \right).