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expintegral_e

expintegral_e(1,0.9);

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expintegral_e

expintegral_e(1,-2);

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expintegral_e-realpart

E1(x):=realpart(-expi...

E1(0.0125);

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expintegral_e

expintegral_e(1,2.);

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expintegral_e-floor-matrix-mod-sin

sin([x,1,1.0]);

mod([x,11,2*a],10);

mod([[x,y,z],11,2*a]...

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expintegral_e

expintegral_e(1,10.00...

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expintegral_e

expintegral_e(1,1);

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expintegral_e-realpart

E1(x):=realpart(-expi...

h(Bo):=exp(Bo/8)*E1(B...

h(0.01);

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expintegral_e

expintegral_e(1,100.0...

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expintegral_e

expintegral_e(1,100.0...

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expintegral_e

Run Example
(%i1)expintegral_e(1,-0.00001);
(%o1)               10.9356998000437 - 3.141592653589793 %i
(%i2) 
Run Example
expintegral_e(1,1.00000);
(%o1)                          0.21938393439552
(%i2) 
Run Example
E1(x):=realpart(-expintegral_e(1,-x));
(%o1)             E1(x) := realpart(- expintegral_e(1, - x))
(%i2) h(Bo):=exp(Bo/8)*E1(Bo/8)/8;
                                         Bo     Bo
                                     exp(--) E1(--)
                                         8      8
(%o2)                       h(Bo) := --------------
                                           8
(%i3) h(0.1);
(%o3)                         - 0.47999658819463
(%i4) h2(Bo):=first(quad_qagi( -0.25*exp(-k^2/8)/(Bo+k^2)*k , k ,0,inf));
                                                    2
                                                 - k
                                    (- 0.25) exp(----)
                                                  8
(%o4)     h2(Bo) := first(quad_qagi(------------------ k, k, 0, inf))
                                               2
                                         Bo + k
(%i5) h2(0.1);
(%o5)                         - 0.48316092332377
(%i6) 

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