What is the meaning of $\Bbb R^{2+}$ in this formula? $$\Gamma_1=\{(z_1,z_2)\in\Bbb R^{2+}:z_1\ge z_2\}$$
Asked
Active
Viewed 32 times
1
-
1It's not standard notation. It could be $\mathbb{R}^+\times \mathbb{R}^+$. – Mathematician 42 Aug 19 '17 at 09:00
-
My guess is that the $+$ notes, that you only observe positive real numbers. Hence $z_1\geq z_2>0$. – Cornman Aug 19 '17 at 09:01
-
Probably the set of pairs of positive real numbers. – mathreadler Aug 19 '17 at 09:07
1 Answers
2
Given that
- $\Bbb R^2$ is the space of ordered pairs of real numbers
- $\Bbb R^+$ are the positive real numbers
I would say that $\Bbb R^{2+}$ is the set of ordered pairs of positive real numbers, although the notation is non-standard.
Parcly Taxel
- 103,344