Re: Running problem in DSolve

*To*: mathgroup at smc.vnet.net*Subject*: [mg132161] Re: Running problem in DSolve*From*: Zhu Sha Zang <zhushazang at gmail.com>*Date*: Mon, 6 Jan 2014 02:31:54 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-outx@smc.vnet.net*Delivered-to*: mathgroup-newsendx@smc.vnet.net*References*: <20140105102705.492E969EB@smc.vnet.net>

Hello there, excuse me. I'm a new user of Wolfram Mathematica software and have two doubts here. 1) What the meaning of using AA'[x]? Ok, the meaning of entire equation like AA'[x] + I*b*EE[x] + c*CC[x] + d*AA[x] == 0? 2) How to made Mathematica use more than on processor? In fact the problem explained here are running in only one of mine 4 cores. Are there a way to force Mathematica make use of the entire power in my computer. Maybe we can accelerate DSolve proccess. To clarify, i'm using 64-bit linux version. Best regards Em 05-01-2014 08:27, saha18swarup at gmail.com escreveu: > Dear Expert, I have some problem running Mathematica and it is > taking too much time. Can you help me? > > Regards Swarup > > eqns = {AA'[x] + I*b*EE[x] + c*CC[x] + d*AA[x] == 0, BB'[x] - > a*CC[x] + I*b*FF[x] - c*DD[x] + d*BB[x] == 0, CC'[x] + a*BB[x] + > I*b*GG[x] + c*AA[x] + d*CC[x] == 0, DD'[x] + I*b*HH[x] - c*BB[x] + > d*DD[x] == 0, EE'[x] + I*b*AA[x] - c*GG[x] - I*e*BB[x] + d*EE[x] == > 0, FF'[x] - a*GG[x] + I*b*BB[x] + c*HH[x] - I*e*AA[x] + d*FF[x] == > 0, GG'[x] + a*FF[x] + I*b*CC[x] - c*EE[x] - I*e*DD[x] + d*GG[x] == > 0, HH'[x] + I*b*DD[x] + c*FF[x] - I*e*CC[x] + d*HH[x] == 0} > > ic = {AA[0] == 1, BB[0] == 0, CC[0] == 0, DD[0] == 0, EE[0] == 1, > FF[0] == 0, GG[0] == 0, HH[0] == 0} > > DSolve[{eqns, ic}, {AA, BB, CC, DD, EE, FF, GG, HH}, x] > - -- - --- Rodolfo T. da Silva

**References**:**Running problem in DSolve***From:*saha18swarup@gmail.com