Implement Montgomery's batch inversion optimization #559
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Description: Added Montgomery's batch inversion trick to Fr.sol for efficient multiple field element inversions. This optimization: - Reduces the number of expensive modular inversions from n to 1 - Replaces expensive inversions with cheaper multiplications - Maintains the same mathematical correctness - Improves gas efficiency for operations requiring multiple inversions
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Description:
Added Montgomery's batch inversion trick to Fr.sol for efficient multiple field element inversions. This optimization: