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What symbol is this?by Gabriel Maia
Tags: symbol 
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#1
Mar2514, 12:22 PM

P: 34

Hi. I was reading a chapter about Stationary Phase Method and I got stuck with this symbol [itex]\Subset[/itex]. I looked it up on tables os mathematical symbols but could not find its meaning.
Can you help me? Thank you. 


#2
Mar2514, 12:38 PM

P: 12

I was reading about that from here http://www.math.ku.dk/~gimperlein/di...onaryphase.pdf but saw no such symbol. What's your source?



#3
Mar2514, 12:45 PM

P: 34




#4
Mar2514, 02:56 PM

P: 180

What symbol is this?
This seems more like a math question to me (I've only seen it in functional analysis), but anyway. In this (and most cases), [itex]\Subset[/itex] tends to be used as an alternative to (the in my opinion rather ugly) [itex]\subset\subset[/itex], and means that one set is compactly contained (or embedded) in the other. For many intents and purposes, you can mentally replace [itex]\Subset[/itex] by the usual subset symbols ([itex]\subset[/itex] or [itex]\subseteq[/itex]).



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