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 March 3rd, 2019, 07:16 AM #1 Newbie   Joined: Mar 2019 From: europ Posts: 1 Thanks: 0 vocabulary Hello and thanks for reply How do you write the set of all maps from $\mathbb {R}^*_+$ to the set of all maps from $\mathbb {R}^*_+$ to $\mathbb {R}^*_+$ like this $\left(\mathbb {R}_+^{*\ \mathbb {R}_+^*}\right)^{\mathbb {R}_+^*}$ or more Simply? is $f_{\phi}\in \left(\mathbb {R}_+^{*\ \mathbb {R}_+^*}\right)^{\mathbb {R}_+^*}$ … blablabla… March 4th, 2019, 02:55 PM #2 Member   Joined: Oct 2018 From: USA Posts: 88 Thanks: 61 Math Focus: Algebraic Geometry I would use \displaystyle \{f : \mathbb{R}^*_+ \mapsto \{g: \; \; \mathbb {R}^*_+ \mapsto \mathbb{R}\}\} Reads like "The set of all functions f such that f maps from R to the set of all functions g such that g maps from R to R" March 4th, 2019, 02:57 PM   #3
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 Originally Posted by Greens I would use $\displaystyle \{f : \mathbb{R}^*_+ \mapsto \{g: \; \; \mathbb {R}^*_+ \mapsto \mathbb{R}\}\}$ Reads like "The set of all functions f such that f maps from R to the set of all functions g such that g maps from R to R"
Delimit your markup with \$to make it render properly as I did here. March 4th, 2019, 07:44 PM #4 Senior Member Joined: Sep 2016 From: USA Posts: 635 Thanks: 401 Math Focus: Dynamical systems, analytic function theory, numerics Quote:  Originally Posted by dsb Hello and thanks for reply How do you write the set of all maps from$\mathbb {R}^*_+$to the set of all maps from$\mathbb {R}^*_+$to$\mathbb {R}^*_+$like this$\left(\mathbb {R}_+^{*\ \mathbb {R}_+^*}\right)^{\mathbb {R}_+^*}$or more Simply? is$f_{\phi}\in \left(\mathbb {R}_+^{*\ \mathbb {R}_+^*}\right)^{\mathbb {R}_+^*}$… blablabla… Once you get to the point where notation is adding confusion instead of making things more clear, you should stop using it. If I needed to talk about this set I would write exactly what you said. something along the lines of..... "Let$S$denote the set of all maps from$\mathbb {R}^*_+$to the set of all maps from$\mathbb {R}^*_+$to$\mathbb {R}^*_+\$." Tags vocabulary Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post SteveThePirate Computer Science 15 May 10th, 2009 04:12 PM

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