Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2018/iii/paper-203/4/a/solution

For the Locality property of SLE, take a compact H-hull away from , and map conformally to by , fixing and infinity and with derivative one at infinity. Up to the first contact with , the image under of an grown in has the same law as grown in , after the change to its own half-plane-capacity parameterization. Equivalently, in the smaller domain has the same initial law as the curve in the larger domain until the latter encounters the removed hull. There is no conditioning on eventual avoidance.
The chordal restriction property for concerns the whole curve. Conditional on avoiding , applying gives the original law, modulo increasing reparameterization:
Its associated avoidance probability, from the SLE eight-thirds restriction martingale, is
Thus locality identifies a stopped, unconditioned law, whereas restriction identifies a conditioned law of the entire curve.

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