Summary
We present a unified approach based on convergence theory to approximating cones and generalized derivatives.
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Dolecki, S. Tangency and differentiation: Some applications of convergence theory. Annali di Matematica pura ed applicata 130, 223–255 (1982). https://doi.org/10.1007/BF01761497
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DOI: https://doi.org/10.1007/BF01761497