It means 'belongs to' eg. If A={1,2,3,4,5,6} then "5 belongs to A"
belongs to the given set and when for number has a cross, it means that 'don't belong to' so, "8 don't belong to A".
e (Epsilon)
That is the Greek letter Epsilon which indicates summation.
The greek letter closest to representing the latin letter e is epsilon (ɛ). In math's, epsilon is mainly used to represent very small positive numbers (e.g. when working with proofs), and used as the Levi-Civita symbol (a.k.a. the permutation symbol, used in tensor calculus, sometimes uses upper epsilon E, instead of lower epsilon ɛ). It is also often used in statistics and numerical analysis to represent errors.
Yes, in statistics, the epsilon symbol is used for maximum allowable error. http://www.liaad.up.pt/~jgama/IWKDDS/Papers/p14.pdf
epsilon generally tends towards zero. if you mean the relative permittivity epsilonr it is material dependent
The symbol for the set of integers is Z from the German word "zahl" = integer.
The symbol for the set of integers is Z and it comes from the German word Zahlen, meaning numbers.
Then you know that the medium is vacuum in free space.And by the way, it's "epsilon naught", not "epsilon not"."Naught" means "zero", and "epsilon naught" means " ε0 " .
The U symbol indicates a Union in set notation. This means that the resulting set is the combination of all unique items in the sets on either side of the symbol.
'Epsilon' is the fifth letter in the Greek alphabet. When used as a symbol to represent math and science things, its value completely depends on the definition you give it. For example, if you were to define epsilon as the wavelength of blue light in feet, then its value would be 0.0000013123 (rounded), whereas if you define epsilon as the average distance between the Earth and sun in Astronomical Units, then its value is precisely 1.0000 . It all depends on your definition of epsilon.
By itself, nothing: it all depends on the context. epsilon is a letter of the Greek alphabet which is used in calculus to represent a very small number.
ℤ is the symbol for the set of all integers, that is {..., -2, -1, 0, 1, 2, ...}.