A 4-bit Shampoo optimizer that quantizes Cholesky factors and adds error feedback matches 32-bit Shampoo's accuracy at a fraction of the memory.
Conservative set valued fields, automatic differentiation, stochastic gradient methods and deep learning
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Memory-Efficient 4-bit Preconditioned Stochastic Optimization
A 4-bit Shampoo optimizer that quantizes Cholesky factors and adds error feedback matches 32-bit Shampoo's accuracy at a fraction of the memory.