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by vladf
997 days ago
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I ended up needing this so often for graph processing, and for values which might be inexact if using floating point, that I saved the formula in a blog post. https://vladfeinberg.com/2020/03/07/subset-isomorphism.html The formula can be "oblivious" to the final size of the matrix too, which is helpful if you're doing some sparse ML training on edges (e.g., GNNs). |
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