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A little confusion over x and y values

  1. May 5, 2012 #1
    Suppose a function is defined as:

    f(x,y)=0 for x=y=0

    Does this mean that the function would be zero when both x and y are xero or when either one of them are zero?
  2. jcsd
  3. May 6, 2012 #2
    It means that at the origin (x,y)=(0,0) or as you write x=y=0, that the function f(x,y)=0.
    I.e. when BOTH are zero.
  4. May 7, 2012 #3
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