Revision history [back]

Hi! This might be somewhat basic, but is there a way to directly reference the dummy variable that pops up, when solving trigonometric functions?

sy(t)=sin(t)/2+7*sin(t/3)/2
sols=solve(sy(t)==0,t, to_poly_solve='force')
sols[0]

returns:

t == 3*pi + 6*pi*z27541

This dummy variable obviously changes every time the command is run, so there is no way of directly referencing it. Obvliously this doesn't work:

sols[0](z=0)

The closest I have come, is just blindly referencing the variable which works if there are no other variables in the right hand side, like this:

sols[0].rhs()(0)

but this gives the obnoxious error message, that "Substitution using function-call syntax and unnamed arguments is deprecated"

Is there a way to cleanly tell sage to evaluate an expression, when all z variables are 0 or 1 etc?

Hi! This might be somewhat basic, but is there a way to directly reference the dummy variable that pops up, when solving trigonometric functions?

sy(t)=sin(t)/2+7*sin(t/3)/2
sols=solve(sy(t)==0,t, to_poly_solve='force')
sols[0]

returns:

t == 3*pi + 6*pi*z27541

This dummy variable obviously changes every time the command is run, so there is no way of directly referencing it. Obvliously Obviously this doesn't work:

sols[0](z=0)

The closest I have come, is just blindly referencing the variable which works if there are no other variables in the right hand side, like this:

sols[0].rhs()(0)

but this gives the obnoxious error message, that "Substitution using function-call syntax and unnamed arguments is deprecated"

Is there a way to cleanly tell sage to evaluate an expression, when all z variables are 0 or 1 etc?

Hi! This might be somewhat basic, but is there a way to directly reference the dummy variable that pops up, when solving trigonometric functions?

sy(t)=sin(t)/2+7*sin(t/3)/2
sols=solve(sy(t)==0,t, to_poly_solve='force')
sols[0]

returns:

t == 3*pi + 6*pi*z27541

This dummy variable obviously changes every time the command is run, so there is no way of directly referencing it. it without changing the reference every time. Obviously this doesn't work:

sols[0](z=0)

The closest I have come, is just blindly referencing the variable which works if there are no other variables in the right hand side, like this:

sols[0].rhs()(0)

but this gives the obnoxious error message, that "Substitution using function-call syntax and unnamed arguments is deprecated"

Is there a way to cleanly tell sage to evaluate an expression, when all z variables are 0 or 1 etc?

Hi! This might be somewhat basic, but is there a way to directly reference the dummy variable that pops up, when solving trigonometric functions?

sy(t)=sin(t)/2+7*sin(t/3)/2
sols=solve(sy(t)==0,t, to_poly_solve='force')
sols[0]

returns:

t == 3*pi + 6*pi*z27541

This dummy variable obviously changes every time the command is run, so there is no way of directly referencing it without changing the reference every time. Obviously this doesn't work:

sols[0](z=0)

The closest I have come, is just blindly referencing the variable which works if there are no other variables in the right hand side, like this:

sols[0].rhs()(0)

but this gives the obnoxious error message, that "Substitution using function-call syntax and unnamed arguments is deprecateddeprecated (...)"

Is there a way to cleanly tell sage to evaluate an expression, when all z variables are 0 or 1 etc?

Hi! This might be somewhat basic, but is there a way to directly reference the dummy variable that pops up, when solving trigonometric functions?

sy(t)=sin(t)/2+7*sin(t/3)/2
sols=solve(sy(t)==0,t, to_poly_solve='force')
sols[0]

returns:

t == 3*pi + 6*pi*z27541

This dummy variable obviously changes every time the command is run, so there is no way of directly referencing it without changing the reference every time. Obviously this doesn't work:

sols[0](z=0)

The closest I have come, is just blindly referencing the variable which works if there are no other variables in the right hand side, like this:

sols[0].rhs()(0)

but this gives the obnoxious error message, that "Substitution using function-call syntax and unnamed arguments is deprecated (...)"

Is there a way to cleanly tell sage to evaluate an expression, when all z variables are 0 or 1 etc?

Hi! This might be somewhat basic, but is there a way to directly reference the dummy variable that pops up, when solving trigonometric functions?

sy(t)=sin(t)/2+7*sin(t/3)/2
sols=solve(sy(t)==0,t, to_poly_solve='force')
sols[0]

returns:

t == 3*pi + 6*pi*z27541

This dummy variable obviously changes every time the command is run, so there is no way of directly referencing it without changing the reference every time. Obviously this doesn't work:

sols[0](z=0)

The closest I have come, is just blindly referencing the variable which works if there are no other variables in the right hand side, like this:

sols[0].rhs()(0)

but this gives the obnoxious error message, that "Substitution using function-call syntax and unnamed arguments is deprecated (...)"

Is there a way to cleanly tell sage to evaluate an expression, when all z variables are 0 or 1 etc?