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Talk:Pascal's triangle: Difference between revisions
first imagined by Pascal? are you sure?
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<lang j>|."_1</lang> rotate each item (each row of characters) by the indicated amount (rotation would be moving contents left except that the amounts are negative).
<lang j>-@|.</lang> reverse and negate the argument (resulting in the negative sequence _4 _3 _2 _1 0)
== first imagined by Pascal? are you sure? ==
In the very first line of the description it's said:
<pre>
Pascal's triangle is an arithmetic and geometric figure first imagined by Blaise Pascal.
</pre>
In addition Pascal drown it as a square triangle while all former representations were isosceles: in the task is shown as isosceles so it is no way the Pascal's triangle (see also the discussion above).
The wikipedia page linked shows a chinese document dated 1303 and the text:
<pre>
The title reads "The Old Method Chart of the Seven Multiplying Squares"
</pre>
here an excerpt from the introduction as can be found in my [https://github.com/LorenzoTa/Tartaglia-s-triangle program about the triangle]
<pre>
In Italy, the arithmetic triangle is called Tartglia's triangle, because exposed in the "General trattato di numeri et misure" written in 1556 by Niccolò Fontana (1499 ca, Brescia 13 December 1557, Venice), known also as Tartaglia.
...
Known as Pascal's triangle (but Pascal drown it as right triangle) in many other countries was known by Halayuda, an Indian commentator, in 10th century, studied around 1100 by Omar Khayyam, a Persian mathematician, known in China as early as 1261 and so studied in India, Greece, Iran, China, Germany and Italy before Pascal.
</pre>
So I definitively vote to change the first sentence from:
<pre>
Pascal's triangle is an arithmetic and geometric figure first imagined by Blaise Pascal.
</pre>
to
<pre>
Pascal's triangle is an arithmetic and geometric named, in most of the western world, after Blaise Pascal.
</pre>
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