Math Is Fun Forum

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Symbols

Hebrew letter Aleph, Used in Mathematics, Number Theory, as in Aleph Null

Partial, pronounced doe

Greek letter Delta, Triangle in Geometry

Infinity

Greek letter Sigma, Sum, Summation

Union, in Set theory

Intersection, in Set theory

Subset, in Set Theory

Superset, In Set Theory

Parallel

Perpendicular

Approximately

Congruence

Proportional to

Belongs to, in Set theory

Less than or equal to

Greater than or equal to

Not equal to

Not approximately

Plus or minus

Empty set, containing no elements

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Re: Symbols

Pi, Greek alphabet, denoting the ratio of circumference of a circle to its diameter. Approximately 22/7. Approximately 3.14

Delta, Greek alphabet, denoting a small quantity

Vector a

Unit vector a

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Re: Symbols

= Alpha, Greek Alphabet, In Physics (Mechanics), denotes acceleration

= Omega, Greek Alphabet, In Physics (Mechanics), denotes angular velocity

= Beta, Greek alphabet, In atomics physics, denotes a type of particles, Beta particles.

= Gamma, Greek Alphabet, In atomic and nuclear physics, denotes a kind of rays, Gamma rays.

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Re: Symbols

= Greek letter, Tau, in Physics, Mechanics, Torque.

= Greek letter, mu, in Physics, in Electiricty and Magnetism, Permeability.

= Greek letter, nu, in Physics, Optics, Refractive Index

= Greek letter, eta, in Physics, used to denote coefficient of Viscosity in Hydrodynamics, Hydostatics

= Greek letter, Sigma, lower case, in Physics

= Greek letter, Omega, upper case

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Re: Symbols

= Root, if no number other than 2 is put inside the symbol, Square root

= Power of, usually. This is not a universal code in mathematics though.

= Tetration, in number theory in Mathematics. As in Knuth's up-arrow notation.

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Identity

Member

Registered: 2007-04-18

Posts: 934

Re: Symbols

Do you know what this symbol is? I remember seeing it somewhere, but I don't know what it means. You can delete my post after.

mathsyperson

Moderator

Registered: 2005-06-22

Posts: 4,900

Re: Symbols

I believe that that's used in sets.
If

, then there's an injection from B to A.

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Why did the vector cross the road?
It wanted to be normal.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Re: Symbols

= Angle

= Negation, in Symbolic logic

= And, in symbolic logic

= Or, in Symbolic logic

Last edited by MathsIsFun (2008-11-02 08:16:16)

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Re: Symbols

Up arrow as in Donald Knuth's up arrow notation.

Up arrow as in Donald Knuth's up arrow notation.

Chained arrow as in John Conway's chained arrow notation.

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Ricky

Moderator

Registered: 2005-12-04

Posts: 3,791

Re: Symbols

: Tensor product

: Direct sum

: Direct product

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"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,405

Re: Symbols

: Contains as a member

: Not an element of

: much less than

: much greater than

: congruent to

: asymptotic

: not equal to

: not less than

: not greater than

: not less than or equal to

: not greater than or equal to

: not subset

: not superset

: not similar

: not congruent

: not approximately equal to

: not asymptotic

Last edited by MathsIsFun (2008-11-02 08:19:50)

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Daniel123

Member

Registered: 2007-05-23

Posts: 663

Re: Symbols

I came across this symbol today as a subscript to L, and it meant luminosity using the sun's as a base - so I'm guessing it means "using the stated base".

All_Is_Number

Member

Registered: 2006-07-10

Posts: 258

Re: Symbols

= And, in symbolic logic

= Or, in Symbolic logic

I believe those are reversed.

= Or (corresponding to

)

and

= And (corresponding to

)

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You can shear a sheep many times but skin him only once.

All_Is_Number

Member

Registered: 2006-07-10

Posts: 258

Re: Symbols

: Does not belong to, in set theory

: Contains as a member

: Not an element of

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You can shear a sheep many times but skin him only once.

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Symbols

All_Is_Number: I think you are right ... does anyone else concur/disagree?

If we get agreement I can simply edit the original post

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

mathsyperson

Moderator

Registered: 2005-06-22

Posts: 4,900

Re: Symbols

Yes, I'd agree with those.
I vaguely remember there being a discussion/argument about this before.
Maybe people started getting abusive and it got deleted?
(Or maybe I made it all up )

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Why did the vector cross the road?
It wanted to be normal.

integer

Member

Registered: 2008-02-21

Posts: 79

Re: Symbols

How are the symbols accessed?
How can I generate/create a symbol?

mathsyperson

Moderator

Registered: 2005-06-22

Posts: 4,900

Re: Symbols

The symbols are part of the LaTeX language that can be used on this forum.
You can post LaTeX by using

becomes

.

There's a fairly thorough tutorial on LaTeX stickied in Help Me!. You can also click on any LaTeX image (like all the ones in the posts above) to see the code that made it.

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Why did the vector cross the road?
It wanted to be normal.

MathsIsFun

Administrator

Registered: 2005-01-21

Posts: 7,713

Re: Symbols

Fixed both, thanks All_Is_Number and mathsy

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"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

DeanPemberton

Member

From: USA

Registered: 2014-10-30

Posts: 20

Website

Re: Symbols

I noted down all the symbols that was given here and also other symbols which was important for me and posted in others. All the symbols are really important for me.