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What category does the M2 model belong to #34

@41924076

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@41924076

Hello, thank you for your great work! M2bert paper mentioned that "Monarch Mixer is part of a new class of architectures called state-space models (SSMs), which include S4, Mamba, and BiGS".
Is Monarch Mixer and M2BERT a part of SSMs?
I consider M2BERT to be:
(1) replace attention with bidirectional gated convolutions with a residual convolution, and set the Monarch matrices to DFT and inverse DFT matrices to speed up DFT for conv;
(2)In the dimension mixer, replace the two dense matrices in MLPs with learned block-diagonal matrices to speed up MLP computation.

I wonder which part of it is related to SSM? I would be very grateful if you could help me with the answer : )

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