QP

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AcronymDefinition
QPQuality Progress
QPQuoted-Printable
QPQuality Policy
QPQatar Petroleum
QPQuadratic Programming
QPQualified Person (UK)
QPQuasi-Peak (electronic detector)
QPQueue Pair (computing)
QPQuantum Physics
QPQuantization Parameter
QPQuestion Period (Canadian Parliament)
QPQuality Product
QPQuery Processor
QPQuarter Pint (measurement)
QPQueen's Pawn (chess)
QPQuality Point
QPQuality Plan
QPQuattro Pro
QPQuilt Packaging
QPQuarter Pound
QPQuality Procedure
QPQualifying Paper
QPQuery Person (police incident code; New Zealand)
QPQualificação Profissional
QPQuality Park
QPQuantizer Parameter
QPQuartet Program
QPQuantum Placet (Latin: as much as wanted)
QPQuarter Plane
QPQuotational Period
QPQuery Person
QPQuality and Planning Program Office
QPQuanto Product
QPQuanti-Pirquet Reaction
References in periodicals archive ?
The first equation in this system characterises the generating function Q(a, u; x, y) of quarter plane walks, counted by the length (variable u), the number of NW or ES corners (variable a), and the coordinates of their endpoint (variables x and y).
Theorem 5 The generating function Q(a, u; x, y) [equivalent to] Q(x, y) of quarter plane walks is characterised by:
The generating function for quarter plane loops is thus
Tungatarov, Four boundary value problems for the Cauchy-Riemann equation in a quarter plane, Eurasian Math.
Tungatarov, Some Schwarz problems in a quarter plane, Eurasian Math.
Harutjunjan, Complex boundary value problems in a quarter plane, Complex Analysis and Applications, Proc.
The number, [E.sub.n], of walks taking steps in E and staying in the positive quarter plane grows asymptotically as [E.sub.n] = [[kappa].sub.E] x [4.sup.n] + O([(1 + 2[square root of 2]).sup.n]).
Theorem 10 Neither the generating function D(t) nor the generating function E(t) for walks in the quarter plane with steps from D and E, respectively, are D-finite.
Non-D-finite excursions in the quarter plane. Pre-print, http://arxiv.org/abs/1205.3300.
The 2D walks that we consider are confined to the quarter plane [N.sup.2], they join the origin of [N.sup.2] to an arbitrary point (i, j) e [N.sup.2], and are restricted to a fixed subset [??] of the step set {[??], [left arrow], [??], [up arrow], [??], [right arrow], [??], [down arrow]}.
For walks in the quarter plane, it is conjectured in [29, Section 3] that D-finiteness is preserved under reversing arrows, i.e., the generating function for a step set [??] is D-finite if and only if the generating function for the step set [??]' is, when [??]' is obtained from [??] by reversing all arrows.
Counting walks in the quarter plane. In Mathematics and computer science, II (Versailles, 2002), Trends Math., pages 49-67.