View Full Version : Math notation?

Griff

June 8th, 2006, 11:09 PM

So can someone tell me exactly what this symbol means? I'm in a discrete mathematics class if that is at all applicable.

[ x + 1/2 ]

Only the top of the brackets are cut off so it looks like a 'L' and a backwards 'L'.

taurus

June 8th, 2006, 11:12 PM

A square brackets--[ ]!!!

The Mekon

June 8th, 2006, 11:17 PM

This link (http://www.staff.vu.edu.au/mcaonline/tool/symbols/symbol.html) may help you but I dont think that they are normally accepted symbols.

Actually I just found a new link (http://amath.colorado.edu/documentation/LaTeX/Symbols.pdf) which shows them a delimiters - whatever that means

curuxz

June 8th, 2006, 11:37 PM

no he means with them in the shape of L's

IE [start L sentance end L sentance]

I think he may have a bad photocopy of normal brackets.

jpkotta

June 9th, 2006, 12:27 AM

That's the floor function. It rounds towards negative infinity.

http://mathworld.wolfram.com/FloorFunction.html

RAV TUX

June 9th, 2006, 02:42 AM

So can someone tell me exactly what this symbol means? I'm in a discrete mathematics class if that is at all applicable.

[ x + 1/2 ]

Only the top of the brackets are cut off so it looks like a 'L' and a backwards 'L'.

you could post your question in the Math Forum at Drexel:

http://mathforum.org/kb/message.jspa?messageID=4157760&tstart=0

jpkotta

June 9th, 2006, 02:52 AM

Also, floor(x + 1/2) is the same (modulo the edges) as round(x), assuming round() rounds to the nearest integer.

aktiwers

June 9th, 2006, 03:00 AM

The ordinary rounding (http://en.wikipedia.org/wiki/Rounding) of the number x to the nearest integer (http://en.wikipedia.org/wiki/Nearest_integer_function) can be expressed as floor(x + 0.5).

http://en.wikipedia.org/wiki/Floor_function

Griff

June 9th, 2006, 03:22 AM

That's the floor function. It rounds towards negative infinity.

That's it! Thanks

I would have done a search but even google might have a problem with 'math bracket L thing' ;)

I did a search for 'floor function' and I think I found what I need:

"The floor function assigns to the real number x the largest integer that is less than or equal to x. The ceiling function assighn to the real number x the smallest integer that is greater than or equal to x."

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