Thanks for the responses. Let me comment on each here:
It is a normal form of an equation in Iran. In Afghanistan, also a
Persian speaking country, mathematical notations are expressed the
same way as in English.
Even in primary school? When kids learn to write 1+2+3 do they start
straight

Hi,
On سهشنبه, 2005-10-18 at 11:42 +0100, Max Froumentin wrote:
Thanks for the responses. Let me comment on each here:
It is a normal form of an equation in Iran. In Afghanistan, also a
Persian speaking country, mathematical notations are expressed the
same way as in English.
Even in

On Tue, 2005-10-18 at 18:33 +0330, Roozbeh Pournader wrote:
About tg vs tan: for a while, tg, cotg, and cosec were used.
Then the academic community switched to tan, cot, and csc but the
high school trigonometry textbooks remained with tg and family. After
a while, the high school textbooks

To answer the parts that other people didn't answer:
On Tue, 18 Oct 2005, Max Froumentin wrote:
Thanks for the responses. Let me comment on each here:
It is a normal form of an equation in Iran. In Afghanistan, also a
Persian speaking country, mathematical notations are expressed the