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MathGroup Archive 1998

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Mathematica Crash

  • To: mathgroup at smc.vnet.net
  • Subject: [mg13697] Mathematica Crash
  • From: Xin Huang <xhuang at glue.umd.edu>
  • Date: Sat, 15 Aug 1998 04:39:26 -0400
  • Organization: Engineering School- University of Maryland
  • Sender: owner-wri-mathgroup at wolfram.com

Everytime I try to evaluate this integral, Mathematica 3.0 crashes and I
get a message saying MathKernel caused an invalid page fault . I have
tried this in Windows 95 and Windows NT environments but it always
crashes everytime I try to evaluate the integrate[ ] I hope some one
can help me try to resolve this problem

Thanks
swami

swami at eng.umd.edu

<<Calculus`DiracDelta`

Constants

T0=0
T1=870
T2= 910
T3= 925
T4= 1072
t1=2
t2=14
t3=17

Functions

TMed[t_]:=
   (UnitStep[t]-UnitStep[t-t1])*(872.979+0.75444*t+7.7461*t^2-1.8634*t^3
)+
     (UnitStep[t-t1]-UnitStep[t-t2])*(
        867.8333+11.3515*t+0.0959916*t^2+0.00137935*t^3)+
     (UnitStep[t-t2]-UnitStep[t-t3])*(
        1411.55-100.136*t+7.66613*t^2-0.168752*t^3)


lambdaSCM[T_] :=
    0.60762915519817362 - 0.00341076479341569083 T +
      3.18080702232159939*10^-6 T^2

Integrate[lambdaSCM[TMed[t]],{t,0,z}]



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