Mathematics

I think it is :) I'm reading an excerpt from a book (The Art of Computer Programming by Knuth) he uses these symbols: └ a ┘ (square brackets without the top. What do they mean?

Parth Kohli

I am thirteen.

Floor function @AndreaCasaccia

unNaturhal

@AndreaCasaccia Great book! :o

Andrea Casaccia

Thank you Parth.

Parth Kohli

4:53 PM

You're welcome, Andrea.

Similarly, square brackets without the bottom is the ceiling function.

Andrea Casaccia

Guessed so :)

Parth Kohli

Hehe. :)

$ \lfloor 2.3 \rfloor = 2 $

Also, $\lceil 2.3 \rceil = 3 $

A little more:
$$\lfloor -2.3 \rfloor = -3 $$$$\lceil -2.3 \rceil = -2 $$

user19161

5:46 PM

@ParthKohli You should read a book, seriously.

user19161

Hello @peter. Did you have a good weekend?

user19161

@ParthKohli SE has community blogs where users contribute now and then. If you want personal blogs you can always use google blogger or wordpress for example.

user19161

@ParthKohli Well, later on you can look at these equations more deeply if you have not done so. For example, rather than manipulating algebraic expressions, you will learn that $x+3=8$ if and only if $x=5$, because the implication goes in two directions. This means if there is a solution, it is $5$ and at the same time, $5$ is indeed a solution.

Peter Tamaroff

@WillHunting It was pretty monotone.

user19161

@PeterTamaroff I see. Was it increasing or decreasing?

Peter Tamaroff

6:01 PM

@WillHunting Constant, then decreasing maybe. I didn't say strictly! I have a cold.

user19161

@PeterTamaroff OK. I did not say you said strictly. In some definitions, monotone increasing or monotone decreasing allows for equality.

user19161

So a constant function is both increasing and decreasing.

user19161

@JonasTeuwen Was it because of all those silly things you always say? Well, never mind, no big deal!

Ragib Zaman

@PeterTamaroff I need a favour from you quickly, could you help?

Peter Tamaroff

@RagibZaman OK.

Ragib Zaman

6:07 PM

I don't want to do it myself since they can see my name.

This is the page of the class the problem is from: maths.usyd.edu.au/u/UG/SM/MATH3966

Peter Tamaroff

@RagibZaman Is the comment OK?¿

user19161

@RagibZaman And what is the problem if they see your name? You are not killing anyone!

Peter Tamaroff

@RagibZaman Do you think it is unfair to get answers?

Ragib Zaman

@WillHunting They clearly go to my class so I will have to see them often..

user19161

@PeterTamaroff I was about to ask that. I know there have been meta threads on this which I have not studied.

Ragib Zaman

6:09 PM

@PeterTamaroff For assignment problems worth course credit, yes?

Peter Tamaroff

@RagibZaman Oh, OK.

user19161

@RagibZaman It depends on what the instructor has instructed really.

user19161

If it is a take home exam where people are allowed to ask etc it is fine.

Ragib Zaman

"The group members, and which
questions they each have written, must be identied clearly on this sheet, and all group
members must sign it. If your group has more than one person, cross out the words \all
my own work" in the certication, and write instead \the work of our group". "

user19161

So it is really about their rules on their side.

Ragib Zaman

6:11 PM

I'm not sure if you can see the assignment but the link is: maths.usyd.edu.au/u/UG/SM/MATH3966/r/loc/asst01-2012.pdf

@PeterTamaroff Could you also add that the assignment is worth course credit and it states explicitly in the instructions it must be their own work

user19161

@RagibZaman Ah, I see.

Ragib Zaman

@PeterTamaroff Thanks heaps.

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$Mathematics$ Mathematics