Error using symengine Unable to prove '2*(c1 + c2 + 1)^(1/2) == 0 & 35 < 5*c1 + 5*c2 + 5' literally.
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Chirakiat
le 17 Nov 2023
Réponse apportée : Walter Roberson
le 17 Nov 2023
I run the code and it returns error "Error using symengine Unable to prove '2*(c1 + c2 + 1)^(1/2) == 0 & 35 < 5*c1 + 5*c2 + 5' literally."
Please help me.
clear all
clc
syms c1 c2
S=50;
r=15;
mu=5;
sigma=2;
L=3;
m=5;
mu_ccLm=(c1+c2+(2*L)-m)*mu
sigma_ccLm=((c1+c2+(2*L)-m)^0.5)*sigma
mm=normcdf(S-r,mu_ccLm,sigma_ccLm)
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Walter Roberson
le 17 Nov 2023
syms c1 c2
S=50;
r=15;
mu=5;
sigma=2;
L=3;
m=5;
mu_ccLm=(c1+c2+(2*L)-m)*mu
sigma_ccLm=((c1+c2+(2*L)-m)^0.5)*sigma
mm=normcdf(S-r,mu_ccLm,sigma_ccLm)
That is the error message I expect for this situation.
There is no special symbolic normcdf() call, so your parameters are being processed by the normal numeric normcdf() call. Several of the statistics-related functions test input parameters numerically in order, such as if they want to have logic similar to
if sigma > 0
do the normal calculation
else
output 0, or nan, or as appropriate
end
There is not much you can do about this, other than to copy the implementing code for normcdf and editing out the numeric tests.
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