DeWitt notation is a mathematical shorthand used primarily in the field of theoretical physics, particularly in quantum field theory and general relativity. It was proposed by physicist Bryce DeWitt to simplify the representation of various mathematical expressions involving sums, integrals, and the treatment of indices. In DeWitt notation, the following conventions are typically used: 1. **Indices**: The indices associated with tensor components are often suppressed or simplified through the use of a compact notation.
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