Symbol Meaning: Capital "V" with Crossbar

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The discussion centers around a capital "V" with a horizontal crossbar found in a 1984 NASA paper. Initially mistaken for an inverted "A" or a logic symbol, it was later identified as representing "Volume of ion production region (m3)." Participants noted the symbol's appearance in the paper, specifically on page 30 in equation (12) and again on page 38. The glossary confirmed its meaning, clarifying its relevance in the context of the paper. The conversation highlights the importance of thorough document navigation to understand specialized symbols.
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I've run across a symbol on a NASA paper from 1984 that I am not familiar with and that I could not find in a web search.

It's a capital 'V' with a horizontal cross bar through its center. Any ideas?
 
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Was it an inverted upper case A? If so it might be the logic symbol meaning "for all".
 
Can you post an image of this symbol or provide a link to the paper?
 
Did it look like this?
$$\forall$$
 
Mark44 said:
Did it look like this?
$$\forall$$

What's it mean?
 
Mark44 said:
Did it look like this?
$$\forall$$

berkeman said:
What's it mean?
It means "for each" or "for all".
 
Well, with what I've been doing, I had become accustomed to the nomenclature of a paper being right up there by the introduction or abstract. So, I finally came to the end of this NASA paper and discovered - ta daaa!

The nomenclature.

So, the symbol, V with a horizontal cross-bar (duplicated by going into Word, or some such, typing a capital V and clicking the strike-through button), anyway, that symbol stands for, "Volume of ion production region (m3)."

Still trying to learn what that is - I am, by no means, really understanding more than the concepts of this paper - so, I don't know what that is, though I kind of have a guess.
 
  • #10
LCKurtz said:
Nice. You give us a 125 page document but no hint on what page to look for your symbol.

Just skimmed through it, there's a symbol matching his description first appearing at the bottom of page 30, in equation (12). Can't work out what it means though -- it appears again on page 38.

EDIT: Just checked the glossary at the bottom. It means "volume of ion production region", measured here in cubic metres.

EDIT 2: According to post #7, the OP has already discovered this...
 
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