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Both packages have Simmetric matrix classes. However their protocol and implementation is different. Symmetric matrix from this package uses a partialColumns instance variable which may be involved in optimization of some operations.

1. Benchmark both packages on a common set of operations.
2. Enumerate behavior provided by this package which could be missing in PMSymmetricMatrix.
3. Enumerate conflicts or pain points.

aAIcolumnmatrix := AIColumnMatrix initializeRows: 3 columns: 3

gives the error "Instance of AIColumnMatrix class did not understand #initializeRows:columns:",
but this method is already defined in the codebase.

How else can we initialize AIColumnMatrix?

aAIMatrix := AIMatrix new: 3.

gives the error "AIMatrix had the subclass responsibility to implement #initializeRows:columns: "