Math Forum Internet News

Volume 4, Number 9

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1 March 1999                                    Vol. 4, No. 9

                 THE MATH FORUM INTERNET NEWS

1999 NCTM Meetings | Formula FAQs: Polar/Spherical/Cylindrical |
MathSearch 1999 NCTM MEETINGS San Francisco, California http://www.nctm.org/meetings/1999/Annual/ The 77th annual meeting of the National Council of Teachers of Mathematics (NCTM) will offer more than 1200 sessions spanning three days, April 22-24, 1999. Technology sessions in computer labs will feature 24 workshops and 6 minicourses. In addition, an open lab will be available for browsing, software previewing, and e-mail checking. The NCTM Electronic Resources Committee (ERC) will present two half-day minicourses focusing on new resources for the K-8 classroom and the 9-12 classroom: http://www.nctm.org/meetings/1999/Annual/tech2000/Tech2000_index.html Major technology speakers and highlights include: - Alan Kay, Disney Imagineering - Susan Schilling, Lucas Learning - Tom Snyder, Tom Snyder Software - CWaC, the Math Forum's "Conference Within a Conference" - Web developers Suzanne Alejandre and Cynthia Lanius http://mathforum.org/alejandre/nctm99.html http://math.rice.edu/~lanius/pres/nctm/ Session information is available onsite: http://www.nctm.org/meetings/1999/Annual/Sessions/ -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- MORE ANALYTIC GEOMETRY FORMULAS FROM THE DR. MATH FAQ http://mathforum.org/dr.math/faq/faq.formulas.html Robert L. "Dr. Rob" Ward has added three more new units to the analytic geometry formula FAQ: 1. POLAR COORDINATES covers coordinates, points, directions, translations, rotations, lines, triangles, and conic sections (hyperbolas, parabolas, ellipses, circles). http://mathforum.org/dr.math/faq/formulas/faq.polar.html 2. SPHERICAL COORDINATES are obtained by using polar coordinates in a plane, adding a vertical axis perpendicular to the plane passing through the pole, and assigning a positive direction to it. http://mathforum.org/dr.math/faq/formulas/faq.spherical.html 3. CYLINDRICAL COORDINATES are obtained by using polar coordinates in a plane, and then adding a z-axis perpendicular to the plane passing through the pole. http://mathforum.org/dr.math/faq/formulas/faq.cylindrical.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- MATHSEARCH - Jim Richardson School of Mathematics and Statistics University of Sydney, Australia http://www.maths.usyd.edu.au:8000/MathSearch.html MathSearch provides access to more than 90,000 searchable English-language documents on mathematics and statistics servers across the Web, primarily at the university and research levels. The search engine accepts up to four phrases, and reports back: - how many sentences in the document contain each phrase - the document title if it exists (otherwise the URL is given) - the WWW server containing the document (if not already given in the URL) - the number of sentences in the document - the total number of stems, other than the ones ignored, in the document A partial description of how the index information was collected is provided: http://www.maths.usyd.edu.au:8000/jimr/pe/Peregrinator.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- 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/ Internet Resources http://mathforum.org/~steve/ 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 _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \

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