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I have lists of matrices stored in various ways. I'd like to extend %*% to work on these. Is this possible, or should I create my own new operator? A simplified example would be as follows: A <- list( A1, A2, A3) B <- list( B1, B2, B3) where A1,...,B3 are all matrices, and I'd like A %*% B to return list( A1 %*% B1, A2 %*% B2, A3 %*% B3) In the real case A and B are sometimes