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About Ferdinando

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  • Birthday December 12

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    Reading, chess
  • College Major/Degree
    Master degree in mathematics
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    Mathematics and physics
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  1. Typically, 0 is considered to be neither positive or negative. When you want to include 0, you typically use the phrase "nonnegative" or "nonpositive" instead. However, it is important to keep in mind that many people do use the word "positive" to include 0, even though it isn't precisely correct.
  2. According to some Calculus textbooks, 0^0 is an "indeterminate form." What mathematicians mean by "indeterminate form" is that in some cases we think about it as having one value, and in other cases we think about it as having another. When evaluating a limit of the form 0^0, you need to know that limits of that form are "indeterminate forms," and that you need to use a special technique such as L'Hopital's rule to evaluate them. For instance, when evaluating the limit Sin[x]^x (which is 1 as x goes to 0), we say it is equal to x^x (since Sin[x] and x go to 0 at the same rate, i.e. limit a
  3. Yes (2,5) is what i found too. I am trying to resolve this equation formally. Thanks for your input.
  4. Sorry, I was thinking of something else. I got distracted. 0^0 is undefined (Of course !)
  5. Prove that for all positive x, y and z (x+y)^z + (y+z)^x + (z+x)^y > 2
  6. Hi D H, 0^0 = 1, if we substitute, then the eq. would be valid And, if x = 1 and y = 0, it will work.
  7. Could you find all positive integer solutions to ... x^y - y^x = x + y
  8. Hi Ajb, Oh, cool ! you're going to a lecture. I look forward to reading your next posting.
  9. "The Elegant Universe" made them reputable in the lay-audience world. Have you read the papers by Alan Sokal ? and, its counterpart in the Bogdanov affair ? The public may have difficulties taking theories seriously. String theorists don't know whether or not nature/reality can be described by this theory. But, they believe it has a very good chance of being true. The Large Hadron Collider (LHC), which is located in France and Switzerland, is scheduled to go online in 2007. It is expected to provide evidence to support aspects of string theory, such as supersymmetry, that is ev
  10. Has anyone worked on the P vs NP problem ?
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