| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 214.1 | | MANANA::COLGATE | | Thu Jan 24 1985 10:00 | 1 |
| how about a cube.
|
| 214.2 | | HARE::STAN | | Thu Jan 24 1985 12:34 | 3 |
| [good straight man]
No, that's not what I'm thinking of.
|
| 214.3 | | SPRITE::OSMAN | | Thu Jan 24 1985 12:35 | 2 |
| Well then, how about NOT the cube, i.e. a solid object consisting of
the REST of the universe !
|
| 214.4 | | METOO::YARBROUGH | | Thu Jan 24 1985 12:53 | 6 |
| No, Stan said nothing about its being regular. How about a 3-dimensional
hexalateral simplaex
(ARGGH!!) simplex?
Lynn Yarbrough
|
| 214.5 | | METOO::YARBROUGH | | Thu Jan 24 1985 12:56 | 2 |
| No, Yarbrough, that fits a hexahedron as well. Hmm. Well, how about a
hexahedral quadrilateral simplex?
|
| 214.6 | | HARE::STAN | | Thu Jan 24 1985 17:03 | 2 |
| re: 3 - Nah. Not the one I'm thinking of either. The one I'm thinking
of is simple, convex, closed and bounded.
|
| 214.7 | | SPRITE::OSMAN | | Thu Jan 24 1985 17:18 | 5 |
| How about something boring like a four-sided pyramid with the point
shaved off, i.e. a cubish object whose top is smaller than the bottom.
I know, I know, it matches but it's "not the one I'm thinking of" right ?
|
| 214.8 | | TURTLE::GILBERT | | Thu Jan 24 1985 19:09 | 8 |
| re .-1
Nah, that would be topologically equivalent to a cube, and would imply
a poorly posed problem.
I've made the ridiculous assuptions that: this is a bounded object in 3-space,
and no face shares an edge with itself; and am still ready to give up. Almost.
Perhaps there's a hole in the object, instead of my reasoning.
|
| 214.9 | | HARE::STAN | | Thu Jan 24 1985 23:26 | 5 |
| Peter is correct, I'm not thinking of the truncated pyramid with square base
or a rectangular solid.
The object I am thinking about has its faces meeting each other only
at edges. It has no holes in it. It lives in ordinary Euclidean 3-space.
|
| 214.10 | | LATOUR::AMARTIN | | Fri Jan 25 1985 09:05 | 3 |
| I'll say "rectangular prism", and hope that in this case that "rectangular"
does not force any edges to be the same length. Or "trapezial prism"?
/AHM
|
| 214.11 | | METOO::YARBROUGH | | Fri Jan 25 1985 09:28 | 2 |
| AHA! It's a triangular pyramid with two corners truncated.
Lynn Yarbrough
|
| 214.12 | | HARE::STAN | | Fri Jan 25 1985 12:40 | 1 |
| Sorry, I'm not thinking of a rectangular prism.
|
| 214.13 | | HARE::STAN | | Fri Jan 25 1985 12:41 | 1 |
| Sorry, I'm not thinking of a trapezial prism either.
|
| 214.14 | | HARE::STAN | | Fri Jan 25 1985 12:44 | 7 |
| Re: 11 - A winner. (Lynn)
Yes, I was thinking of a tetrahedron with two corners truncated.
The resulting solid has 6 faces, 2 of them are pentagons, 2 of them
are quadrilaterals and 2 of them are triangles. The two pentagons
share a common edge, as do the two quadrilaterals.
|
| 214.15 | | SPRITE::OSMAN | | Mon Jan 28 1985 15:23 | 5 |
| I don't understand the answer. A picture is worth a thousand words. Please
draw it.
Thanks !
|
| 214.16 | | R2ME2::GILBERT | | Tue Jan 29 1985 02:24 | 3 |
| Pyramix is a Rubik's Cube-like puzzle, in the shape of a tetrahedron (a pyramid
with a three-sided base). Break or cut off two of the (four) corners. Can you
picture it now?
|
| 214.17 | | METOO::YARBROUGH | | Tue Jan 29 1985 10:28 | 14 |
| Here 'tis. The dotted horizontal line does not intersect the solid lines.
_______
/ \ / \
/ \ / \
/ | \
/ | \
/ | \
/........|........\
\ | /
\ | /
\ | /
\ / \ /
\ / \ /
\/_____\/
|