# All Questions

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### state of art MAX-SAT solver for ising spin glass

What is the best MAX-SAT solver problems for Ising spin glass? I tried Scip-Max-sat and open-wbo. While open-wbo cannot solve the instance with only 27 variable Scip-max-Sat fail to solve the one with ...
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### Saving symbolic function to increase efficiency in Matlab

I have a lengthy expression which is calculated using symbolic differentiation of a rather complicated function. I now intend to call this resulting (symbolic function) in a for loop many times, and ...
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### Experiment report with hypothesis for simulated model [on hold]

I'm setting up an experiment for a simulation. I'm not sure how to formulate the hypothesis. The model used in the simulation is the first iteration, so I'm just using 2 attributes, 1 independent (A) ...
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### Maple stored variable to be read into Matlab

I have a a function $f(k)$ (calculated in Maple) which is huge and stored in a variable called 'sum' on my drive (with the help of 'save' command in Maple). Since the function is huge, Maple is unable ...
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### How to connect two fitted B-spline curve?

I use B-spline curve fitting to obtain one smooth curve. If I obtain two smooth B-spline , how can I connect then smoothly. For example, I have 59 points((x0,y0,z0),...,(x58, y58, z58)) and I have two ...
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### numerical integration of exponential which contains complex function

Hello everyone i'd like to get the result of Fresnel-Kirchhoff integral in paraxial approximation to the cylindrical diffracted wave and here is a part of my code and if it is solved gonna be carried ...
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### Are there any algorithms “incrementally remove part of data (esp., old data)” from the existing SVD model of a data?

Sometimes it is meaningful to remove the influence of some old data from a SVD-based model, so as to reflect the most updated trends and provide more accurate results. I've seen there're incremental ...
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### Poisson solver diverged

My 2D-Poisson solver is build for simulation of semiconductor. The algorithm is Gauss-Seidel iterative method. If I use simple PN junction for simulation testing, it diverged while I applied high ...
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### library of efficient data types and algorithms [closed]

I come across LEDA(library of efficient data types and algorithms) for doing graph theory algorithms: http://www3.cs.stonybrook.edu/~algorith/implement/LEDA/implement.shtml I want to ask besides ...
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### How to plot function with evenly spaced xvalues in Matlab

'Im trying to plot this function func=exp(x-sqrt(2))-cos(x-sqrt(2))-(x-sqrt(2)) in Matlab using 101 evenly spaced x values. If I just say fplot(fun,[-1 3], 'o') the graph is the correct shape but the ...
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### LBM for thermal anlysis

Can Lattice-Boltzmann methods be used for thermal analysis of radiation or conduction? (Hints for papers and libraries are highly appreciated.)
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### Fast methods to solve an elliptic PDE if high accuracy is needed only in part of the domain

Does someone know a method to get cheap approximation of harmonic problems (and possibly local approximations)? Let me explain: I need to compute the solution of an harmonic problem ...
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### State of the art in pseudo-boolean optimization [closed]

Pseudo-boolean optimization is known to be NP-hard. What is the current state of the art (how many variables, interaction parameters) in solvers for pseudo-boolean optimization problems? What is the ...
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### Max weighted subset (max sum diversification)

Given a set of elements $V$, with known cost $\pi_S$ for each subset $S \subset V$ and a monotone increasing function on the subsets $f(S)$ . I'm wondering if there is a pseudo-polynomial algorithm ...
So my fellow numerical computational peeps it may be that I am suffering from sleep deprivation but I'm struggling to numerically compute a function $u \rightarrow h(u)$ defined implicitly as follows: ...