"gen" argument in sympy.solvers.inequalities.solve_univariate_inequality

[Amit Saha]

Hi all,

What does the "gen" argument mean in the context of
"solve_univariate_inequality(expr, gen, relational=True)" [1] ?

[1] http://docs.sympy.org/dev/modules/solvers/inequalities.html#sympy.solvers.inequalities.solve_univariate_inequality


Thanks,
Amit.

--
http://echorand.me

[AMiT Kumar]

Hi Amit,

The `gen` argument corresponds to the symbol you are solving for

the univariate inequality (expr).

Example:

>>> solve_univariate_inequality(x**2 >= 4, x)
    Or(And(-oo < x, x <= -2), And(2 <= x, x < oo))


>>> solve_univariate_inequality(x**2 >= 4, x, relational=False)
    (-oo, -2] U [2, oo)

AMiT Kumar

3rd Year Undergrad

Delhi Technological University

www.iamit.in

[Amit Saha]

On Sun, May 10, 2015 at 7:01 PM, AMiT Kumar <dtu....@gmail.com> wrote:
> Hi Amit,
>
> The `gen` argument corresponds to the symbol you are solving for
> the univariate inequality (expr).
>
> Example:
>
>>>> solve_univariate_inequality(x**2 >= 4, x)
> Or(And(-oo < x, x <= -2), And(2 <= x, x < oo))
>
>
>>>> solve_univariate_inequality(x**2 >= 4, x, relational=False)
> (-oo, -2] U [2, oo)

Thank you for your reply. Yeah I figured that out. My query was more
of: what did "gen" mean in this context?
I believe it refers to polynomial generator?




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http://echorand.me

[AMiT Kumar]

Yes, It meant the same, though this function is available in Public API, 

but loosely speaking It was meant mostly for internal use with solve, 

that's why the name `gen` is used instead of symbol.

AMiT Kumar

3rd Year Undergrad

Delhi Technological University

www.iamit.in

--
http://echorand.me