Now we have to try it the other way
May. 17th, 2004 06:07 pmMaxx: Dr. D?
Mr. Dr. Crane: Dr. D?! You just called me a tall, ugly, bald guy!
Well, I've started an entry, I better finish it, no?
We're playing team handball in gym. (Actually today was the last day.) Apparently I'm a really good goalie. Good enough that even the teacher (Mr. Symons) thinks I am and that people who haven't seen me play have heard about it. How... strange. I hurt my thumb during gym today, actually. I tried to block the ball with my hand but it hit my thumb and bent it backward and went into the goal anyway.
Bleh. Mr. Weems said he wasn't assigning any more essays, but he's assigning one on Hamlet anyway. Apparently he only said no more *formal* essays. What in space is an informal essay?
Random math fact of the <period of time> : Q×≃Z[x]×C2
Hooray for Unicode. For those who can't read that, it's an "is isomorphic to" symbol.
(By Z[x] I really mean its additive group... is there any standard notation for that, for additive group? I thought maybe a superscript plus, like the superscript times for units group/multiplicative group, but then Z+ means N. So for now I'm just going to keep writing rings when really I mean their additive groups.)
Why that? Because I just realized it the other day. It's also kind of interesting because it's incredibly obvious if you know what it means but an absolute pain to explain to somebody who doesn't. Then again I suppose there are a lot of things like that.
Actually a bit ago I put up on one of Mr. Demeter's side boards a proof that ¬∃ a field F st F×≃Z. (Once again that's an "is isomorphic to" symbol.) (Yeah, I could have Unicoded "there does not exist" as ∄, but I prefer you all being able to read it.) See a few weeks ago I was wondering if there was and I was able to prove there wasn't, but the problem was that nobody could read my proof, seeing as how, well, it was the worst-written proof I've ever seen. But I finally managed to write it up nicely, on one of Mr. Demeter's side boards. Next to it Kathryn Gorski drew a picture of a horribly distorted (specifically, the head was way too big) rabbit, with the note "Math is stupid. Look at the cute rabbit." I may have that slightly wrong, as now both the proof and the rabbit have been erased. Actually later Marshall went and drew fangs on the rabbit and changed "cute" to "evil", but then someone changed it back. Also when I originally wrote the proof I didn't recall the notation for multiplicative group, and I wrote it out, only I misspelled it "multiplicitave" (as I originally did when writing this entry, in fact). Chris pointed this out to me, and I fixed it, but then I remembered the notation for multiplicative (gah I almost made that same spelling error again) group and used that instead. Though the proof was erased, I put the statement back up. It's my random math fact of the <slightly longer period of time>.
Whoo. That was florbly.
-Sniffnoy
--
"See that? Everyone on Earth is only one degree away from someone named
Kevin who eats bacon!"
-Ratbert
Mr. Dr. Crane: Dr. D?! You just called me a tall, ugly, bald guy!
Well, I've started an entry, I better finish it, no?
We're playing team handball in gym. (Actually today was the last day.) Apparently I'm a really good goalie. Good enough that even the teacher (Mr. Symons) thinks I am and that people who haven't seen me play have heard about it. How... strange. I hurt my thumb during gym today, actually. I tried to block the ball with my hand but it hit my thumb and bent it backward and went into the goal anyway.
Bleh. Mr. Weems said he wasn't assigning any more essays, but he's assigning one on Hamlet anyway. Apparently he only said no more *formal* essays. What in space is an informal essay?
Random math fact of the <period of time> : Q×≃Z[x]×C2
Hooray for Unicode. For those who can't read that, it's an "is isomorphic to" symbol.
(By Z[x] I really mean its additive group... is there any standard notation for that, for additive group? I thought maybe a superscript plus, like the superscript times for units group/multiplicative group, but then Z+ means N. So for now I'm just going to keep writing rings when really I mean their additive groups.)
Why that? Because I just realized it the other day. It's also kind of interesting because it's incredibly obvious if you know what it means but an absolute pain to explain to somebody who doesn't. Then again I suppose there are a lot of things like that.
Actually a bit ago I put up on one of Mr. Demeter's side boards a proof that ¬∃ a field F st F×≃Z. (Once again that's an "is isomorphic to" symbol.) (Yeah, I could have Unicoded "there does not exist" as ∄, but I prefer you all being able to read it.) See a few weeks ago I was wondering if there was and I was able to prove there wasn't, but the problem was that nobody could read my proof, seeing as how, well, it was the worst-written proof I've ever seen. But I finally managed to write it up nicely, on one of Mr. Demeter's side boards. Next to it Kathryn Gorski drew a picture of a horribly distorted (specifically, the head was way too big) rabbit, with the note "Math is stupid. Look at the cute rabbit." I may have that slightly wrong, as now both the proof and the rabbit have been erased. Actually later Marshall went and drew fangs on the rabbit and changed "cute" to "evil", but then someone changed it back. Also when I originally wrote the proof I didn't recall the notation for multiplicative group, and I wrote it out, only I misspelled it "multiplicitave" (as I originally did when writing this entry, in fact). Chris pointed this out to me, and I fixed it, but then I remembered the notation for multiplicative (gah I almost made that same spelling error again) group and used that instead. Though the proof was erased, I put the statement back up. It's my random math fact of the <slightly longer period of time>.
Whoo. That was florbly.
-Sniffnoy
--
"See that? Everyone on Earth is only one degree away from someone named
Kevin who eats bacon!"
-Ratbert
