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seen Jul 9 at 1:10

I'm old. I get confused. OK?


Sep
15
accepted Does using an ellipse as a template still produce an ellipse?
Sep
15
comment Does using an ellipse as a template still produce an ellipse?
OK, thanks. I suspected as much, but my math is weak enough that I wasn't sure. And your diagram very nicely illustrates how it breaks down.
Sep
15
comment Does using an ellipse as a template still produce an ellipse?
@J.M. -- Yep, essentially that kind of router. A collar would be fastened either to the base or to the shaft of the bit to hold the bit a fixed distance from the template edge.
Sep
15
asked Does using an ellipse as a template still produce an ellipse?
Sep
9
comment Is there at least one irrational number with the property that it cannot be defined by a finite string of information?
(Got to thinking about it and realized my second statement above was wrong, in the most general sense. With a circular number line (what's the technical term?) you could have a finite number of orderable numbers and still not be able to identify one of them.)
Sep
8
comment Is there at least one irrational number with the property that it cannot be defined by a finite string of information?
I would observe that if there is such a number there's got to be more than one. And, if a finite number, they must somehow be unorderable (if that makes any sense at all).
Aug
31
accepted What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
Aug
31
revised What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
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Aug
31
comment What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
That's looking pretty good. I fudged the 2 factor to 2.5 (moved the 0.5 point to about 55), added a small linear component (to get closer to 100), and the capped the result at 99.9. It's smooth and "looks right", at least to my eyes (can never guess what the customer will think). I'll call it good.
Aug
31
comment What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
I'll take a look at it, right after I finish wrestling with a different alligator.
Aug
31
comment What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
Well, actually I was getting f(32) = 99, and hoping for something closer to f(50) or f(75) = 99. But thanks -- I'll look at your formula
Aug
31
comment What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
x can never be less than zero. I can cap in the 100-200 range, though. Obviously, if y approaches 100 then there's no precision to be lost in larger x values.
Aug
31
awarded  Supporter
Aug
31
comment What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
Yeah, I'm looking at that. 100*(1 - exp(x*7/50)) comes close, but, while x=0.5 yields roughly 50 (which I want), we get to 99 at around x=32, whereas I'd like it to be closer to x=50 or 75. So I'm open to some other "simple" equations.
Aug
31
asked What's the simplest curve that has an inflection point at zero and is asymptotic at 100.0?
Aug
17
awarded  Scholar
Aug
17
accepted Need mathematical function for “adding” 0.5 and 0.5 and getting 0.4
Aug
17
awarded  Commentator
Aug
17
comment Need mathematical function for “adding” 0.5 and 0.5 and getting 0.4
Well, I'm going to give Didier the "answer", since he's contributed a lot. I'd still like to hear a few other ideas, though.
Aug
10
revised Need mathematical function for “adding” 0.5 and 0.5 and getting 0.4
added 142 characters in body