Charts Definition and 57 Threads

PVC, PEC or ?? I am looking for some help in determining the appropriate type of plastic for my application. I am in the process of having a slide chart manufactured out of plastic. It was recommended that I use 0.024 inch thick clear PVC. The samples produced with the PVC were fine with...

Homework Statement Solve the fallowing by factoring and making appropriate sign charts. 2x^2+4x\leq3 Homework Equations The Attempt at a Solution It simply does not factor the way I want it to(unless I did something wrong). I don't think it wants me to use the quadratic formula, and...

Hi, everyone: I have been reading Boothby's intro to diff. manifolds, and in def. 4.3, talking about 1-1 immersions F:N->M , n and m-mfld. and M an m-mfld. That: "...F establishes a 1-1 correspondence between N and the image N'=F(N) of M. If we use this correspondence to give...

4 charts seem to cover it. BUt only 2 will do for a minimal number? Just like 2 charts will do to cover a sphere? Even though there are 6 all together.

Hey guys, does anyone uses or knows about a software package that allows me to do gradation charts? (a gradation chart is a simple graphic where the x-axis is in logarithmic scale and the y-axis is in natural scale)

I was wondering about this, I've never seen any general theorem. Obviously it takes more than one, but I would think that in general it can take quite a few, for I can't see how to cover a torus with only 2. Is there any sort of general result on this?

anything out there that could help me with this? or is there no limit? or does it depend on gauge?