Robatoy wrote in news:6fd02584-2c4d-4f87-8d48-
:

On Mar 21, 12:47*pm, Han wrote:
[snip]

- here is an
elderly guy who likes to peel his oranges with a knife ...

Spiral or quadrant/sectional along vertical axis?

Gewoon op z'n nederlands LOL.

My son-in-law teaches math of various kinds in a high school, but he isn't
nearby enough to ask what you meant. Lastig ...

--
Best regards
Han
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