References
- Auslender , A. 1984 . Stability in Mathematical Programming with nondifferentiable data . SIAM J. Control and Optimization , 22 ( 2 )
- Axler , S. , Bourdon , P. and Ramey , W. 1992 . Harmonic Function Theory , Springer .
- Clarke , F.H. 1983 . Optimization and nonsmooth analysis , Wiley .
- Demyanov , V.F. and Rubinov , A.M. 1980 . On quasidifferentiable functionals . Dokl. of USSR Acad. of Sci , 250 ( 1 ) : 21 – 15 .
- Hayman , W.K. and Kennedy , P.B. 1976 . Subharmonic functions , Acad Press .
- Janusauskas , A. 1977 . On the coefficients of harmonic functions that are positive in the unit ball . Dokl. Acad. Nauk. SSR 234, Nr , 4 : 785 – 788 .
- Müller , C. 1966 . Spherical Harmonics . Lecture Notes in Math , 17
- Rado , T. 1937 . Subharmonic functions Berlin
- Recht , P. 1992 . On generalized Gradients , 36 : 201 – 210 . ZOR
- Recht , P. 1993 . Generalized Derivatives: an approach to new gradient in nonsmooth optimization . Math. Systems in Economics , 136
- Rockafellar , K.T. 1981 . The theory of subgradients and its application to problems of optimization , Holdermann .
- Sloan , H.T. 1995 . Polynomial interpolation and hyperinterpolation over general regions . J. Approx. Theory , 83 : 238 – 254 .
- Sloan , H.T. 1997 . Interpolation and Hyperinterpolation on the Sphere . Multivariate Approx.: Recent trends and results, Math Research , 101 : 255 – 268 .