$\Sigma\Sigma^\top(x,a)$ is bounded and uniformly nondegenerate (for classical $C^2$ theory; relaxation leads to viscosity solutions).
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In memory, infinities have all exponent bits set to \(1\)s, and to distinguish them from NaNs, all their significant bits are \(0\)s.。https://telegram官网对此有专业解读
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