### Volume 4, Number 34A  -  August 1999 Discussions

 ``` 25 August 1999 Vol. 4, No. 34A THE MATH FORUM INTERNET NEWS - AUGUST 1999 DISCUSSIONS This special issue of the Math Forum's weekly newsletter highlights recent interesting conversations on Internet math discussion groups. For a full list of these groups with links to topics covered and information on how to subscribe, see: http://mathforum.org/discussions/ Replies to individual discussions should be addressed to the appropriate group rather than to the newsletter editor. ______________________________ + ______________________________ AUGUST SUGGESTIONS: GEOMETRY-RESEARCH http://mathforum.org/epigone/geometry-research/ - Hyperbolic embedding (15 Aug. 1999) http://mathforum.org/epigone/geometry-research/khingmolswi/ "If you embed a 2-D Euclidean surface within a 3-D Hyperbolic space then do you see the (so-called flat) surface having a positive curvature?" - Uday Patil - Cutting a torus (16 Aug. 1999) http://mathforum.org/epigone/geometry-research/molkoopheh/ "What happens when you cut a torus, normal to the circular cross-section, all the way around? Okay, the simplest cut produces two half toruses that can be separated. But suppose you rotate the blade slowly, so that it makes a half turn (180 degrees) as it travels around the torus. Can you separate the 'halves'? What about a full turn?" - Colin Cook ______________________________ + ______________________________ GEOMETRY-SOFTWARE-DYNAMIC http://mathforum.org/epigone/geometry-software-dynamic/ - Geometer's Sketchpad or Cabri Geometry? http://mathforum.org/epigone/geometry-software-dynamic/voudekox/ "As a future middle or high school math teacher, I was wondering which of the two software packages is the best. I would certainly welcome the opinions of anyone familiar with either one or preferably both. Are there any published reviews available? What features are the best? Which is the most powerful? Which is the easiest to learn and to use?" - Seth Johnson ______________________________ + ______________________________ K12.ED.MATH http://mathforum.org/epigone/k12.ed.math/ - Multiplication drill? (19 Aug. 1999) http://mathforum.org/epigone/k12.ed.math/maxstalcrex/ "I am tutoring a 15-year-old. She has quite a bit of mathematical ability, but can't multiply as she has never really learned her tables, and that is holding her back. Are there any (preferably free or shareware) programs on the Internet which provide drill in multiplication for such people in a palatable format?" - Ian Lowery ______________________________ + ______________________________ MATHEDU http://mathforum.org/epigone/mathedu/ - Logic of wrong solutions (21 Aug. 1999) http://mathforum.org/epigone/mathedu/proxspilte/ "Are there any materials about the logic underlying wrong solutions given by students? I am familiar with some of this at K-12 (e.g., arithmetic), but I am interested in post-calculus, notably proving theorems and solving problems. I am interested in related matters of modeling that are part of the mathematical reasoning process. - Harvey Greenberg ______________________________ + ______________________________ MATH-TEACH http://mathforum.org/epigone/math-teach/ - Critical Thinking (19 Aug. 1999) http://mathforum.org/epigone/math-teach/skunlermswex/ "Our school is looking at the place of critical thinking in the curriculum. Can anyone help me with information about critical thinking and mathematics?" - D. McBain ______________________________ + ______________________________ SCI.MATH http://mathforum.org/epigone/sci.math/ - Math for computer programmers? (22 Aug. 1999) http://mathforum.org/epigone/sci.math/kherfoplou/ "What branches of mathematics would be most useful for computer programmers in general?" - Michael ______________________________ + ______________________________ We hope you will find these selections useful, and that you will browse and participate in the discussion group(s) of your choice. CHECK OUT OUR WEB SITE: The Math Forum http://mathforum.org/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/pow/ Mathematics Library http://mathforum.org/library/ Teacher2Teacher http://mathforum.org/t2t/ Discussion Groups http://mathforum.org/discussions/ Join the Math Forum http://mathforum.org/join.forum.html Send comments to the Math Forum Internet Newsletter editors ```