SUBST - Revision history

Jrheinlaender at 18:50, 19 December 2018

2018-12-19T18:50:37Z

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	[[SUBSTC]] [[SUBSTV]]		[[SUBSTC]] [[SUBSTV]] [[SUBSTVC]]
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	[[Category:Manipulation]]		[[Category:Manipulation]]

Jrheinlaender at 19:17, 29 June 2017

2017-06-29T19:17:08Z

← Older revision		Revision as of 19:17, 29 June 2017
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	Substitute the equation or the list of equations into the expression. All substitutions will be done in parallel, which means that after substituting a list of equations like <code>x = y; y = z</code> the expression might still contain the variable <code>y</code>. In this case you need to use [[SUBSTC]] instead.		Substitute the equation or the list of equations into the expression/equation. All substitutions will be done in parallel, which means that after substituting a list of equations like <code>x = y; y = z</code> the expression might still contain the variable <code>y</code>. In this case you need to use [[SUBSTC]] instead.
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Jrheinlaender: Created page with "{{Keyword | `SUBST ( expression | equation , equation | equation list )` | 2= Substitute the equation or the list of equations into the ex..."

2017-06-29T18:51:31Z

Created page with "{{Keyword | <code>SUBST ( expression | equation , equation | equation list )</code> | 2= Substitute the equation or the list of equations into the ex..."

New page

{{Keyword
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<code>SUBST ( [[expression]] | [[equation]] , [[equation]] | [[equation list]] )</code>
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Substitute the equation or the list of equations into the expression. All substitutions will be done in parallel, which means that after substituting a list of equations like <code>x = y; y = z</code> the expression might still contain the variable <code>y</code>. In this case you need to use [[SUBSTC]] instead.
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<code>@eq:cubic@ EQDEF x^3 + a x^2 + b x + c = 0</code>

<code>@eq:tsch3@ EQDEF y = x + {a over 3}</code>

<code>EQDEF COLLECT(SIMPLIFY(SUBSTC(@eq:cubic@, SOLVE(@eq:tsch3@, x, 1)),"expand"), y)</code>

This will perform the Tschirnhaus transformation on the cubic equation, reducing it to the depressed form <code>y^3 + p y + q</code>.
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[[SUBSTC]] [[SUBSTV]]
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[[Category:Manipulation]]

SUBST - Revision history

Jrheinlaender at 18:50, 19 December 2018

Jrheinlaender at 19:17, 29 June 2017

Jrheinlaender: Created page with "{{Keyword | SUBST ( expression | equation , equation | equation list ) | 2= Substitute the equation or the list of equations into the ex..."

Jrheinlaender: Created page with "{{Keyword | `SUBST ( expression | equation , equation | equation list )` | 2= Substitute the equation or the list of equations into the ex..."