Comment by kcrisman for If what you are interested in is computing values of...
Yeah, for plotting this would be fine.
View ArticleAnswer by mmarco for Hello,I tried to plot the following function $$Л(\theta)...
If what you are interested in is computing values of this function, you can use numerical integration instead of symbolic: sage: el = lambda theta: -numerical_integral(log(abs(2*sin(u))), 0, theta)[0]...
View ArticleComment by kcrisman for Hello,I tried to plot the following function...
This is actually pretty bizarre, and (sadly) yet *another* error in Maxima's `abs_integrate`. I'm getting really frustrated with that package about now, even though it adds a lot of awesome integrals....
View ArticleComment by FrédéricC for Hello,I tried to plot the following function...
Even that does not work: sage: integral(log(abs(2*sin(u))), u, 0, pi/3)
View ArticleWhat's wrong with Лобачевский function?
Hello, I tried to plot the following function $$Л(\theta) = -\int_0^\theta \log |2 \sin(u)| du$$ (called the Lobatchevski function). So I started with sage: theta, u = var('theta', 'u') sage: assume(0
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