Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#326 Re: Help Me ! » matrices » 2007-11-22 04:44:24

for what its worth, when two matrices are such that AB = BA, the matrices A and B are said to "commute". But the fact is, most unequal matrices do not commute. So you probably could have picked any random matrix and it would have worked. Note, NullRoot choose matrices with lots of zeros to make it easier to multiply.

#327 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-21 11:05:50

1. Woman dead
2. No she was not a scientist.
3. No she was not involved in the arts.
4. No she was not involved with feminism

#328 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-21 10:56:30

I'm beginning to see a pattern emerging! tongue

1. Woman dead
2. No she was not a scientist.
3. No she was not involved in the arts.

#329 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-21 10:50:01

1. Woman dead
2. No she was not a scientist.

#330 Re: Dark Discussions at Cafe Infinity » God is true » 2007-11-21 10:16:00

ah.. that is true. Wealth was not explicitly mentioned. My mistake.

I was talking about the part of prayer which I found to be contradictory to logic.

fair enough.

It has nothing to do with ignoring God, but rather with being required to ask for his help.  He should know that you need and/or want it.  Ignoring him and not asking for help are not equivalent things.

I THINK you are saying one would not be required to ask for help in order to obtain it. And I agree.

#331 Re: Maths Is Fun - Suggestions and Comments » favorites icon? » 2007-11-21 09:25:53

Hey! I noticed the icon now appears before the URL in my adress bar, but it still hasn't appeared in favorites. Was everything set properly?

(edit) Hey! Now its up there! Awesome! Looks great! smile

#332 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-21 09:00:22

since JohnnyReinB seems to have dissapeared, I guess I'll go next.

1. Woman, dead.

#333 Re: Dark Discussions at Cafe Infinity » God is true » 2007-11-21 08:52:38

The idea of praying originated back way before the Judo-Christian belief, where gods where not omniscient.  In this context, praying, that is, asking for help, makes complete sense.  When you have an omniscient being, asking for help is quite redundant.

I really think this is a place where religious discussions should be avoided, and i don't want to go into this much, but that seems an unfair dismissal of the subject. There are many forms of prayer besides asking for help. For example, there is prayer as a means of associating with or "spending time" with God, Allah, Buddha or whoever. There is prayer to do homage, prayer to give thanks, prayer of confession/reparation, etc. But even in the case of help, what you are more or less saying (IF I'm not mistaken) is that people should be able to ignore God, Allah, Buddha etc. and expect him to do favors for you. I think the idea is that going to god for help, and trusting he will do something, is in itself pleasing and this itself makes you more deserving of help. But of course, a god is free to choose not to help for whatever reason regardless of whether or not you deserve it.

Problem is that people usually do see prayer as a source of material wealth. While the Islamic religion is, i believe, quite compatible with material wealth, Christ discouraged all attachment to it on numerous occasions. So I agree, a Christian expecting prayer to grant you money and riches is foolish.

#334 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-20 10:34:01

8. was it Carl Friedrich Gauss? smile

#336 Re: Help Me ! » computing integral » 2007-11-20 03:57:30

is that z supposed to be an x?

#338 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-20 03:52:20

hehehe!

6. was he alive in the 18th century?

#339 Re: Maths Is Fun - Suggestions and Comments » Polynomials - Division and Long Division » 2007-11-20 03:50:45

Nice! The only thing i'd reccomend is showing what to do when there are "missing terms". In this case, you need to write out the missing terms with coefficients of zero for the algorithm to work.

#340 Re: Help Me ! » simplify » 2007-11-19 13:45:53

What? I'd rather stick my head in a blender!

#341 Re: Help Me ! » simplify » 2007-11-19 12:10:07

uh.. what kind of simplification do we want? One way is summation

∑ tan(2^n)/cos(2^n+1) from n = 0 to 7.

#343 Re: Maths Is Fun - Suggestions and Comments » favorites icon? » 2007-11-18 19:05:58

More ideas...

okay, that last one was a joke... lol

#344 Re: Maths Is Fun - Suggestions and Comments » favorites icon? » 2007-11-18 16:58:14

I'll give 500 bucks to anyone who can tell me what this is without having seen this thread lol this isn't even 16 color.

I'd like to be proven wrong but I'm pretty sure an 8 sided dye is far too complex to be drawn in 16x16.

#345 Re: Maths Is Fun - Suggestions and Comments » favorites icon? » 2007-11-18 15:27:06

It looks like everyone wants the semitransparent, 8 sided dye from the top of the forum.

#346 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-18 15:18:34

crud! I've never heard of Ann Radcliffe either.

4. was he a scientist?

Also i should point out that you are supposed to relist the questions before the answers, abbreviating as you see fit.

Like this:
1. Man. dead
2. Yes he died before the 20th century
3.  No he was not involved in the arts.

#347 Re: Maths Is Fun - Suggestions and Comments » favorites icon? » 2007-11-17 18:08:14

on second thought.. this actually doesn't look too bad.

Just a bit small.

#348 Re: Maths Is Fun - Suggestions and Comments » favorites icon? » 2007-11-17 17:23:03

I tried doing that but its quite hard to fit into a 16x16 inch drawing and still be able to tell what it is. Possible, maybe, but hard!

#349 Re: Maths Is Fun - Suggestions and Comments » favorites icon? » 2007-11-17 16:08:53

Well I've been thinking about it for a while. Its difficult. 16x16 is hardly enough room to draw anything except a single small object. There isn't room for an equation or formula. I thought of geometric shapes or the dye pictured above, but there's really only room for one. You can for instance draw a cone, a circle, a triangle, a graph of a line, etc. but none seemed fitting.

After much deliberation i produced this. Not only is it simple, practical, and clearly describes what this site is about, it has a determinant!

What do you think?

#350 Re: Dark Discussions at Cafe Infinity » Q20 » 2007-11-17 15:16:33

Hehe! Well at least we got that out of the way. But now Ive asked too many questions. Its someone else's turn.

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