/sci/ - Science & Math

[Anonymous No.3147213]

What do these two letters mean in math notation?

[Anonymous No.3147240]

The first means "is an element of"

The second is the standard symbol for a small value by faggots that think non-standard analysis is inferior to epsilon-delta rubbish.

[Anonymous No.3147242]

>>3147213
The first one means that x is an element of R, and the second one is an arbitrarily small number. So the statement describes the set of all real numbers that are less than epsilon away from a.

[Anonymous No.3147246]

The first is the set membership relation, pronounced as "is an element of". The second is just some random greek letter (the epsilon, to be exact), which happens to look alike.

[Anonymous No.3147265]

Is there an online repository of mathematical symbols and notations? I've seen the wikipedia one, but that's not at all comprehensive in regards to cataloging notation in its entirety.

[Anonymous No.3147295]

>>3147265
unfortunately context plays a part epsilon may also mean

http://en.wikipedia.org/wiki/Epsilon#Math_and_science

[Anonymous No.3147327]

>>3147240
And what is the lowercase delta?

[suicidalmathmajor No.3147425]

epsilon and delta usually just signify very very small numbers and N and M signify very large numbers if you are reading any sort of analysis type of math

[Anonymous No.3148095]

that is the rune symbol of the god tyr.

[Anonymous No.3148114]

is a set of / is an element of

sure is 4th grade in here

[Anonymous No.3148116]

>>3147327
epsilon and delta usually have the relationship: given any epsilon, there is a delta

http://en.wikipedia.org/wiki/%28%CE%B5,_%CE%B4%29-definition_of_limit

[Anonymous No.3148129]

>>3148114
real analysis is hardly 4th grade.

not recognising real analysis sure is high school

[Anonymous No.3148130]

1st "some" or "element of"
2nd "very small number" or "positive near 0 number"