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| (1) |
Adjust the dependent variables to have the smallest possible dependencies on the independent variables (x,y).
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| (2) |
When dep= is specified as list of functions or names, only those dependent variables with new dependencies are required.
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| (3) |
Adjust the dependent variables to depend on all independent variables.
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| (4) |
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| (5) |
Any invalid adjustment to the dependencies will trigger an error. For example, xi has to depend at least on y.
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Note: the second argument dep = [xi] specifies the dependent variable xi to have no dependencies (i.e. to be a constant). These four LHPDEs should be essentially the same (i.e. they have same LHPDOs).