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MakeRule

MakeRule[expr]
gives rule(s) suitable for substitutions into differential equations using expr.
MakeRule[expr, term]
gives rule(s), with respect to term, suitable for substitutions into differential equations using expr.
  • expr can be either an equation or a rule or a system of equations or rules.
  • When only expr is supplied the equation(s) or rule(s) must have on the left hand side only the term that will be substituted.
  • term, when supplied, indicates the term which will be substituted. One for each expression must be provided.
EXAMPLESCLOSE ALL
Basic Examples   (2)
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Making a substitution rule for the heat equation assuming that we wish to substitute teh term ut:
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equivalently,
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If we wish to make a substitution against the term uxx:
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or
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For a list of expressions:
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or if different terms are needed:
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