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This paper deals with the blow-up of the solution to a non-local reaction diffusion problem under nonlinear boundary conditions. Lower bounds for blow-up time are derived when the blow-up does occur.
The effects of synchronising the ion ejection pulse to the phase of the applied r.f. drive potential upon the operation of a quadrupole ion storage trap (QUISTOR) in the mass spectrometric mode have been examined. Experimental stability diagrams for two ions (m/e 20 and 40) have been obtained, and the results discussed in relation to mass spectra of n-heptane recorded for eight different phases of ejection.
In a previous paper (1988) we studied the numerical stability of the fundamental solution method applied to the Dirichlet problem of Laplace's equation, and presented a practical scheme for examining the stability of Order Nike Free Online Canada the method using the singular value decomposition. In the present paper, we give an asymptotic estimate of the stability with respect to the number of collocation points.
We consider the complexity of the Shortest Common Supersequence (SCS) problem, i.e. the problem of finding for finite strings S1, S2,…, Su a shortest string S such that every Si can be obtained by deleting zero or more elements from S. The Nike Free 3.0 V5 SCS problem is shown to be NP-complete for strings over an alphabet of size ⩾ 2.