blogging calc i

March 31, 2011 in Math 151

without wanting to commit myself… here goes. i’m *undercommitted* this quarter goodness knows. my calculus blogging from spring ’09 might come in handy (but the Calc III stuff is mixed in with the Calc I). for that matter, the common errors page (not by me) that i cited yesterday is *bound* to come in handy. [...]

…or just a fantastically mangled example…?

March 30, 2011 in Links

lindley’s paradox at angrymath. eric schechter’s common errors file.

the natural log is *not* the reciprocal

March 29, 2011 in Math 151, Rambles

i’ve got a post for spring quarter. yay! less money again and i suppose less prestige… i’m running two sections of a calc class. the students see lectures (not by me) on mondays and wednesdays and meet me for guided-problem-solving (and to hand in homeworks and take quizzes; exams have yet a different schedule; i [...]

duality in the 2-dimensional projective space over the field with 4 elements

March 25, 2011 in Graphics, Projective Spaces

new drawing today. you can check my work… as of course i already *have*: start with any “cross”, C, and verify on five cross-diagrams (by shading one “circle” on each… namely the one whose position corresponds to that of C in the “big picture”) that the “Point-at-C” belongs to each of the “Lines-through-C”. i’ll edit [...]

teacher blog action day

March 22, 2011 in Job

according to EDUSolidarity (moving images on the screen; yick) or this f’book page, today is “teacher blog action day”. so i’ve signed on… and should now post a piece on why i’m pro-union. “why teachers like me support unions.” this is harder than it sounds. it’s my old “imagine an appropriate audience” problem. everybody *knows* [...]

first quarter roundup (pre-final edition)

March 13, 2011 in Meta

january 01/07/11 Blogging 104. Week One. so far so good 01/07/11 Some Finite Projective Spaces photos of zines 01/13/11 Our Medium Is Handwriting drawings of guitar scales 01/18/11 time considered as a sequence of many-named values (modulo twelve) scales for math-heads 01/26/11 today’s morning ramble: music theory oh, no, oot, eeth, rho… 01/28/11 across the [...]

imminent fall of the academy predicted

March 13, 2011 in Gush

math ed issue of the notices. also: ben’s back (at research in practice).

few but ripe

March 11, 2011 in Links

alison wolf in her own words, at micromath (borovik).

another self-dual space

March 8, 2011 in Graphics, Projective Spaces

not a projective space though (there are “parallel lines”, for example). ten “lines” through ten “points”. you can get this by using 2-element subsets of {0,1,2,3,4} as points. the lines are then triples (like {0,1}–{1,2}–{0,2}) such that each point of the triple is the symmetric difference () of the other two. the point associated to [...]

Math Teacher At Play: e-to-the-i-theta

March 4, 2011 in Cool Tricks

Somebody’s preparing a lecture or something and mentions the angle-sum laws. There are two of ‘em sharing the office with me doing the same class (different from mine but one I’ve taught many times). Says he probably won’t get to it tonight. Me: “I could never remember the doggone things until I found out about [...]