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check if one object is contained in another
E IsIn F
where E and F are CoCoA objects. For a precise description of
allowable objects, see the full online help entry.
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The semantics of IsIn is explained in the following table:
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| POLY IsIn IDEAL checks for ideal membership. |
| VECTOR IsIn MODULE checks for module membership. |
| OBJECT IsIn LIST checks if the list contains the object. |
| STRING IsIn STRING checks if the first string is a substring |
| of the second one. |
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IsIn operator