Solution to Exercise 6 (This is a title)

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\[P_t(x, y) = \mathbb 1\{x = y\} + t Q(x, y) + o(t)\]

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(1)ΒΆ\[P_t(x, y) = \mathbb 1\{x = y\} + t Q(x, y) + o(t)\]