Notations

Reference Sites

\(\mathbb{U}\): Universal set
\(\mathbb{Z}\): ganze Zahl(Integer)
\(\mathbb{Q}\): Quotient(Rational number)
\(\mathbb{P} = \mathbb{R \setminus Q}\): Irrational number
\(\mathbb{D}\): Complex irrational
\(\mathbb{E}\): Interval [0,1]
\(\mathbb{I}\): An Interval
\(\mathbb{C}\): Complex number
\(\mathbb{N}\): Natural number
\(\mathbb{W} = \mathbb{N} \cup \lbrace 0 \rbrace\): Whole number
\(\mathbb{R}\): Real number
\(\ddot{I}(\mathbb{R})\): Set of functions which are strictly increasing on \(\mathbb{R}\).
\(\ddot{i}(\mathbb{R})\): Set of functions which are monotonically increasing on \(\mathbb{R}\).
\(\mathcal{PIN}\): Purely Imaginary Number
\(\mathcal{PN}\): Prime Numbers
\(\mathbb{F}\): Set of functions
\(\mathbb{S}\): Solutions of equations, inequalities, etc.
\(\mathcal{Poli} = \displaystyle \lbrace p|p=\sum_{k=0}^n a_kx^k, n \in \mathbb{W} \rbrace\)

\(x \perp y\) : x is coprime to y
\(CP(n) = \lbrace x|x \perp n \rbrace\)
\(\mathbb{r}\): ratio
\(IRT\) : isosceles right triangle
\(f \in C^0(\mathbb{R}) \iff\) \(\forall x \in \mathbb{R}\), \(f\) is continuous
\(f \in -C^0(\mathbb{R}) \iff\) \(\forall x \in \mathbb{R}\), \(f\) is not continuous

Definition 1 (\(a^m = N \iff m = log_aN\))

제품의 규격에서 가로세로높이를 표현할 때는 주로 WDH 사용