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This is mathematically equivalent to ℝ\ℚ, the set difference between the reals and the rationals

(as a side note, if you are looking for those characters ( the R and the Q) or wonder how to make them with your keyboard, they are called blackboard bold. Have a look at the link.)

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12y ago

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There is no special symbol for Irrational Numbers in general. There are symbols for some special numbers, such as pi and e.

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14y ago
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Q: What is the symbol for irrational number?
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