Geodesic
The edge wave in the problem of diffraction from the curvature jump on the boundary of the region
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 27, Tome 250 (1998), pp. 274-287

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A problem of the diffraction of the creeping waves over-running from the side of the convex boundary to the point of the curvature jump – the point of transition of the convex boundary into the straight boundary is studied. On passing throught the point of the curvature jump, the tangent to the region boundary is changed continiously, but the velocity of this change has the jump. The edge wave is received and investigated. 
@article{ZNSL_1998_250_a17,
     author = {V. B. Philippov and N. Ya. Kirpichnikova},
     title = {The edge wave in the problem of diffraction from the curvature jump on the boundary of the region},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {274--287},
     publisher = {mathdoc},
     volume = {250},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1998_250_a17/}
}
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V. B. Philippov; N. Ya. Kirpichnikova. The edge wave in the problem of diffraction from the curvature jump on the boundary of the region. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 27, Tome 250 (1998), pp. 274-287. http://geodesic.mathdoc.fr/item/ZNSL_1998_250_a17/