Re'el taal

\mathbb {R}

Re'el taalen (ütspreegen: re-el, mengde $\mathbb {R}$ ) san aal a taalen, diar dü üüb en taalstrual finj könst. Bütj a ratsionaal taalen san det uk taalen, diar dü ei üs en bröök skriiw könst, tun bispal det kreistaal Pi.

Iindialang

Ratsionaal taalen: $\mathbb {Q} =\left\{\dots ,-{\tfrac {2}{1}},-{\tfrac {1}{2}},-{\tfrac {1}{1}},0,{\tfrac {1}{1}},{\tfrac {1}{2}},{\tfrac {2}{1}},{\tfrac {1}{3}},\dots \right\}=\left.\left\{{\tfrac {p}{q}}\right|p\in \mathbb {Z} ,q\in \mathbb {N} \setminus \{0\}\right\}$ $\mathbb {Q} =\left\{\dots ,-{\tfrac {2}{1}},-{\tfrac {1}{2}},-{\tfrac {1}{1}},0,{\tfrac {1}{1}},{\tfrac {1}{2}},{\tfrac {2}{1}},{\tfrac {1}{3}},\dots \right\}=\left.\left\{{\tfrac {p}{q}}\right|p\in \mathbb {Z} ,q\in \mathbb {N} \setminus \{0\}\right\}$
- Hial taalen: $\mathbb {Z} =\{\dots ,-2,-1,0,1,2,\dots \}$ $\mathbb {Z} =\{\dots ,-2,-1,0,1,2,\dots \}$ .
  - Natüürelk taalen: $\mathbb {N}$ (saner 0): $\{1,2,3,\dots \}$ of (mä 0): $\{0,1,2,3,\dots \}$ (uk $\mathbb {N} _{0}$ ).
Irratsionaal taalen: $\mathbb {R} \setminus \mathbb {Q}$ = det mengde faan aal a taalen uun $\mathbb {R}$ , diar ei tu $\mathbb {Q}$ hiar.