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I’m doing research in Optimization and I have found this obstacle in the way. If we have set of half planes like $ c_ix\leq b_i$ where $ i\in \{1,\ldots ,k\}$ there is an algorithm(it would be better if it is polynomial time) such that we can certify $ \{\cup _{i\neq p}\{c_ix\leq b_i\}\}\subset \{c_px\leq b_p\}$ IfRead more

Someone purchased a plane ticket with my credit card illegally. It was a flight to nicaragua. Will my credit card company cancel the ticket and catch the guy at the airport? Will they refund me?Read more

Can I board a flight from Tijuana to Juarez without a passport and only using a California ID?Read more

Is it known what the smallest tile (in terms of area) that can tessellate the hyperbolic plane is? In particular, it should tessellate the plane by itself. I think it will be a Triangle group, but I’m not sure. (In spherical geometry, the answer is that there is no smallest tile, because you can makeRead more

I want to efficiently compute weighted average of the whole cartesian plane with weight $ \overline{r}(x,y)$ The definition of $ \overline{r}(x,y)$ is the average radius of the closed region $ \mathcal{C}$ from any point. Suppose we have curve $ \mathcal{C}$ with a ray, rotating by $ \theta$ , which emenates from point $ \mathbf{p}$ intersectingRead more

I want to try to volunteer with Workaway, but I want know first whether I or the host will pay for the plane ticket. Because if I need to pay, maybe I can’t afford it.Read more

I am interested in hearing how working research mathematicians work with the complex plane, the complex numbers as something to work with geometrically, visualize in their day-to-day life. The more fields/areas of math that are addressed the better. Of course this could be asked on MSE, but due to the research mathematicians specification I’m askingRead more

I’m a total newbie to Python and I decided to learn by building an app and picking up concepts along the way. I decided to make an app where you can view a catalog of plane flights. Once you click on one, a new screen appears where you can view a map of the plane,Read more

This is a followup to the answered question, “Can any sequence of consecutive integers be realized as winding numbers?.” Answer: Yes (domotorp). Now I would like to define a local winding number as follows. For any region $ R$ delimited by arcs of a planar curve $ C$ , define the local winding number asRead more

Let’s say I want to fly from Prague to New York, with 1 stops or direct, on a route that takes less than 16 hours. I don’t particularly care about the airline, the exact times, the exact airports in New York, etc. The only thing I care about is the price and I want toRead more