stationary point

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stationary point

See direct motion.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

stationary point

[′stā·shə‚ner·ē ′pȯint]
(astronomy)
A point at which a planet's apparent motion changes from direct to retrograde motion, or vice versa.
(mathematics)
A point on a curve at which the tangent is horizontal.
For a function of several variables, a point at which all partial derivatives are 0.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Since [gamma] is a (-1)-curve on S, the curve [gamma] x {o} x {0} on X spans the extremal ray R([subset] [bar.NE](X)) of divisorial type.
We shall first quantize a black hole with B [not equal to] 0; the quantization of an extremal black hole is then achieved by approximation.
Janowski, "Some extremal problems for certain families of analytic functions," Annales Polonici Mathematici, vol.
Then [K.sub.1] is said to be an extremal subset of [K.sub.2] if and only if A; B [member of] [K.sub.2] and [alpha]A + (1 - [alpha])B [member of] [K.sub.1] for some 0 < [alpha] < 1 implies that A; B [member of] [K.sub.1]:
It divides itself into two extremal positions: the position of the master and the position of the slave and by such a division self-consciousness presents its negative economy requiring the infinite exchange of life and death.
Stroke width transform (SWT) [10] and maximally stable extremal regions (MSERs) [13]are two representative techniques for CCs based methods.
For the values [c.sub.1] = [c.sub.2] = 0 and [c.sub.3] = 2, from (2.1), we derive the extremal function, given by
"We propose a computational approach to discover families of microstructures with extremal macroscale properties automatically."
The radial equation has five regular singularities, which reduce to hypergeometric functions in the near-horizon extremal limit [92].
If [gamma] is a closed curve in M, then its vertical torus [S.sub.[gamma]] = [[pi].sup.-1]([gamma]) is a Willmore-like surface, if and only if, [gamma] is a extremal of the following elastic-like energy [E.sub.[phi]]([gamma]) = [[integral].sub.[gamma]]([[kappa].sup.2] + 4[phi])ds.
Considerable progress has been made to determine necessary and sufficient conditions that any extremal for the variational functional with fractional calculus must satisfy in recent years.