nabla


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nabla

[′nab·lə]
(mathematics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
We intend to investigate the corresponding results in the q-fractional nabla difference case.
Throughout this article, we use the following notation, definitions, and known results of fractional nabla calculus [10]: Denote the set of all real numbers and complex numbers by R and C, respectively.
Both theories of the delta and the nabla calculus can be applied to any field that requires the study of both continuous and discrete data.
for all t [member of] [[[t.sub.0],[infinity]).sub.T], where [??] is the nabla exponential function [6, Definition 3.10].
These formulas contain delta and nabla derivatives and integrals at the same time and they are elaborated in Section 2.
He used only the "language" of quaternions, namely scalars, vectors, and nablas, as we do today, except for a difference in notation for the divergence and curl of a vector A:
where [u.sup.[nabla]] is the nabla derivative (see [7]), u(t) is a 2-vector function, and