# Difference between revisions of "Main Page"

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Do varietal wines, e.g. pure cabernet sauvignon, make sense? It seems like a blend of grapes with different properties *has* to be better, e.g. one for color, one for aroma, one for body. Is it that with the varietal, at least one knows there's no rotgut cheap grape involved? | Do varietal wines, e.g. pure cabernet sauvignon, make sense? It seems like a blend of grapes with different properties *has* to be better, e.g. one for color, one for aroma, one for body. Is it that with the varietal, at least one knows there's no rotgut cheap grape involved? | ||

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+ | https://en.wikipedia.org/wiki/Positive_real_numbers says: | ||

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+ | Although the symbols {\displaystyle \mathbb {R} _{+}}\mathbb {R} _{+} and {\displaystyle \mathbb {R} ^{+}}{\mathbb {R}}^{{+}} are ambiguously used for either of these, the notation {\displaystyle \mathbb {R} _{+}}\mathbb {R} _{+} or {\displaystyle \mathbb {R} ^{+}}{\mathbb {R}}^{{+}} for {\displaystyle \left\{x\in \mathbb {R} \mid x\geq 0\right\}}{\displaystyle \left\{x\in \mathbb {R} \mid x\geq 0\right\}} and {\displaystyle \mathbb {R} _{+}^{*}}{\displaystyle \mathbb {R} _{+}^{*}} or {\displaystyle \mathbb {R} _{*}^{+}}{\displaystyle \mathbb {R} _{*}^{+}} for {\displaystyle \left\{x\in \mathbb {R} \mid x>0\right\}}{\displaystyle \left\{x\in \mathbb {R} \mid x>0\right\}} has also been widely employed, is aligned with the practice in algebra of denoting the exclusion of the zero element with a star, and should be understandable to most practicing mathematicians. | ||

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==Original Stuff from Wikimedia== | ==Original Stuff from Wikimedia== |

## Revision as of 06:27, 22 September 2020

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## Notes

Do varietal wines, e.g. pure cabernet sauvignon, make sense? It seems like a blend of grapes with different properties *has* to be better, e.g. one for color, one for aroma, one for body. Is it that with the varietal, at least one knows there's no rotgut cheap grape involved?

https://en.wikipedia.org/wiki/Positive_real_numbers says:

Although the symbols {\displaystyle \mathbb {R} _{+}}\mathbb {R} _{+} and {\displaystyle \mathbb {R} ^{+}}{\mathbb {R}}^Template:+ are ambiguously used for either of these, the notation {\displaystyle \mathbb {R} _{+}}\mathbb {R} _{+} or {\displaystyle \mathbb {R} ^{+}}{\mathbb {R}}^Template:+ for {\displaystyle \left\{x\in \mathbb {R} \mid x\geq 0\right\}}{\displaystyle \left\{x\in \mathbb {R} \mid x\geq 0\right\}} and {\displaystyle \mathbb {R} _{+}^{*}}{\displaystyle \mathbb {R} _{+}^{*}} or {\displaystyle \mathbb {R} _{*}^{+}}{\displaystyle \mathbb {R} _{*}^{+}} for {\displaystyle \left\{x\in \mathbb {R} \mid x>0\right\}}{\displaystyle \left\{x\in \mathbb {R} \mid x>0\right\}} has also been widely employed, is aligned with the practice in algebra of denoting the exclusion of the zero element with a star, and should be understandable to most practicing mathematicians.

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