ⵡⵉⴽⵉⴱⵉⴷⵢⴰ:ⴰⵎⵏⵏⵉ ⵓⴼⵔⵉⵏ/19

ⵜⴰⵙⵖⵏⵜ (ⵙ ⵜⵏⴳⵍⵉⵣⵜ: function), ⴳ ⵜⵓⵙⵏⴰⴽⵜ, ⵜⴳⴰ ⵢⴰⵏ ⵓⵍⵓⴳⵏ ⵉⵣⴷⴰⵢⵏ ⴽⵓ ⴰⴼⵔⴷⵉⵙ ⵙⴳ ⵜⴳⵔⵓⵎⵎⴰ ⵜⴰⵎⵣⵡⴰⵔⵓⵜ, ⵉⵜⵜⵓⵙⵎⵎⴰⵏ ⵜⴰⵖⵓⵍⵜ, ⵙ ⵢⴰⵏ ⵓⴼⵔⴷⵉⵙ ⴰⵎⵢⵉⵡⵏ ⵙⴳ ⵜⴳⵔⵓⵎⵎⴰ ⵜⵉⵙⵙ ⵙⵏⴰⵜ, ⵉⵜⵜⵓⵙⵎⵎⴰⵏ ⵜⴰⵣⴷⴰⵖⵓⵍⵜ. ⵉⴳⴰ ⵓⵔⵎⵎⵓⵙ ⵏ ⵜⵙⵖⵏⵜ ⴰⵔⵙⵍⴰⵏ ⴳ ⵓⵎⴰⵜⴰ ⵏ ⵉⴳⵔⴰⵏ ⵏ ⵜⵓⵙⵏⴰⴽⵜ ⴷ ⵜⵓⵙⵙⵏⵉⵡⵉⵏ ⵢⴰⴹⵏⵉⵏ. ⵜⵓⵇⵇⵏⴰ ⴰⴷ ⴷⴰ ⵜⴻⵜⵜⵓⵙⴽⴰⵏ ⴳ ⵓⵎⴰⵜⴰ ⵣⵓⵏ ⴷ "ⵜⴰⵎⴰⵛⵉⵏⵜ" ⵉⵜⵜⴰⵎⵥⵏ ⵜⵉⵏⴽⵛⵓⵎⵉⵏ (ⴰⴼⵔⴷⵉⵙ ⵙⴳ ⵜⴰⵖⵓⵍⵜ) ⵜⴼⴽ ⵜⵓⴼⴼⵖⴰ ⵜⴰⵎⵢⵉⵡⵏⵜ (ⴰⴼⵔⴷⵉⵙ ⵏ ⵜⵣⴷⴰⵖⵓⵍⵜ). ⵙ ⵓⵎⴷⵢⴰ, ⵜⴰⵙⵖⵏⵜ ⵍⵍⵉ ⵉⵣⴷⴰⵢⵏ ⴽⵓ ⴰⵎⴹⴰⵏ ⴰⵏⵉⵍⴰⵡ $x$ ⵙ ⵓⵎⴽⴽⵓⵥ ⵏⵏⵙ $x^{2}$ ⵜⴳⴰ ⵜⴰⵙⵖⵏⵜ. ⴷ ⵉⴱⴷⴷ ⵓⵙⵏⵎⵍ ⴰⵍⵖⴰⵏ ⵏ ⵜⵙⵖⵏⵜ ⵖⴼ ⵓⵔⵎⵎⵓⵙ ⵏ ⵜⵢⵓⴳⵉⵡⵉⵏ ⵉⵏⵎⴰⵍⴰⵏ. ⵜⴰⵙⵖⵏⵜ $f$ ⵙⴳ ⵜⴳⵔⵓⵎⵎⴰ $X$ (ⵜⴰⵖⵓⵍⵜ) ⵖⵔ ⵜⴳⵔⵓⵎⵎⴰ $Y$ (ⵜⴰⵣⴷⴰⵖⵓⵍⵜ) ⵜⴳⴰ ⵢⴰⵜ ⵜⴳⵔⵓⵎⵎⴰ ⵏ ⵜⵢⵓⴳⵉⵡⵉⵏ ⵉⵏⵎⴰⵍⴰⵏ $(x,y)$ ⵍⵍⵉ ⴳ ⵉⴳⴰ $x$ ⴰⴼⵔⴷⵉⵙ ⵙⴳ $X$ ⴷ $y$ ⵉⴳⴰ ⴰⴼⵔⴷⵉⵙ ⵙⴳ $Y$, ⵙ ⵜⴼⴰⴷⴰ ⵏ ⴰⴷ ⵢⵓⵎⴰⵏ ⴽⵓ ⴰⴼⵔⴷⵉⵙ $x$ ⴳ $X$ ⵢⴰⵜ ⵜⴽⴽⵍⵜ ⵀⵍⵍⵉ ⴰⵎⵎ ⵉⵙⴳⵔ ⴰⵎⵣⵡⴰⵔⵓ ⴳ ⵜⵢⵓⴳⴰ. ⴷⴰ ⵜⴻⵜⵜⵢⴰⵔⴰ ⵜⵓⵇⵇⵏⴰ ⴰⴷ ⵙ ⵉⵎⴽⴰ $f:X\to Y$. ⵉⴳ ⵉⵍⵍⴰ $(x,y)$ ⴳ ⵜⵙⵖⵏⵜ $f$, ⴷⴰ ⵏⵜⵜⵉⵏⵉ ⵎⴰⵙ ⴷ $y$ ⵜⴳⴰ ⵜⵓⴳⵏⴰ ⵏ $x$ ⵙⴳ $f$, ⵏⴰⵔⴰ $y=f(x)$.

ⴷ ⵜⴻⵜⵜⵓⵙⵎⵎⴰ ⵜⴳⵔⵓⵎⵎⴰ ⵏ ⵡⴰⵣⴰⵍⵏ ⴰⴽⴽⵯ $f(x)$ ⵍⵍⵉ ⵏⵥⴹⴰⵕ ⴰⴷ ⵏⴰⴼ ⵜⵓⴳⵏⴰ ⵏ ⵜⵙⵖⵏⵜ $f$ ⵏⵖ ⴰⵣⵉⵍⴰⵍ ⵏⵏⵙ. ⵉⵇⵇⴰⵏ ⴷ ⴰⴷ ⵓⵔ ⵏⵙⵎⵔⴽⴰⵙ ⴳⵔ ⵜⵓⴳⵏⴰ (ⴰⵣⵉⵍⴰⵍ) ⴷ ⵜⵣⴷⴰⵖⵓⵍⵜ. ⵜⴰⵣⴷⴰⵖⵓⵍⵜ ⵜⴳⴰ ⵜⴰⴳⵔⵓⵎⵎⴰ $Y$ ⵍⵍⵉ ⴳ ⵥⴹⴰⵕⵏ ⴰⴷ ⵉⵍⵉⵏ ⵡⴰⵣⴰⵍⵏ ⵏ ⵜⵓⴼⴼⵖⴰ, ⵎⴰⵛⴰ ⵜⵓⴳⵏⴰ (ⴰⵣⵉⵍⴰⵍ) ⵜⴳⴰ ⵜⴰⴳⵔⵓⵎⵎⴰ ⵏ ⵡⴰⵣⴰⵍⵏ ⵏ ⵜⵓⴼⴼⵖⴰ ⵍⵍⵉ ⵏⵉⵜ ⵉⴳⴰⵏ ⵜⴰⵢⴰⴼⵓⵜ. ⵙ ⵓⵎⴷⵢⴰ, ⴳ ⵜⵙⵖⵏⵜ $f(x)=x^{2}$, ⵉⴳ ⵜⴳⴰ ⵜⴰⵖⵓⵍⵜ ⴷ ⵜⵣⴷⴰⵖⵓⵍⵜ ⵜⴳⵔⵓⵎⵎⴰ ⵏ ⵉⵎⴹⴰⵏⵏ ⵉⵏⵉⵍⴰⵡⵏ $\mathbb {R}$, ⵀⴰⵜ ⴰⵣⵉⵍⴰⵍ (ⵜⵓⴳⵏⴰ) ⵉⴳⴰ ⵜⴰⴳⵔⵓⵎⵎⴰ ⵏ ⵉⵎⴹⴰⵏⵏ ⵉⵏⵉⵍⴰⵡⵏ ⵓⵎⵏⵉⴳⵏ $[0,+\infty )$, ⵍⵍⵉ ⵉⴳⴰⵏ ⵖⴰⵙ ⴰⴳⵣⵣⵓⵎ ⵙⴳ ⵜⵣⴷⴰⵖⵓⵍⵜ.

ⵙⵙⵏⴼⵍ · ⵖⵔ ⵓⴳⴳⴰⵔ