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SProbe, a trailing verification kernel that reads the output of an unmodified vendor GEMM and detects every injected fault across seven fault classes and four matrix sizes, including constructed patterns that TR-ABFT never detects and patterns that a weighted grid code detects but cannot correct.
FP-Sketch is presented, a verifier that runs after an unmodified tensor core GEMM whose half precision operands are accumulated and delivered at FP32, and its constant depends on the BLAS and the operand format and must grow as $n^{2.57}$ for a square product.
