Let $x, y \in \mathbb{R}^n$, when $x^T y = y^T x$ ?
2026-04-01 12:41:52.1775047312
Product of two vectors
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$x^T y = y^T x$ always. Note that $x^T y$ is a scalar (i.e. a real number), so its transpose is itself ($y^T x = (x^T y)^T = x^T y$).