To write “sun”, “moon” and “tree” in picture-writing, one draws simply a circle, a crescent and some simplified, conventionalized picture of a tree, respectively. Picture-writing was used by some tribes of red Indians and it may well be that more advanced systems of writing evolved everywhere from this primitive system. And so picture-writing may be the ultimate source of the Greek, Latin and Gothic alphabets, the letters of which we currently use as mathematical symbols. I wish to observe that also the primitive picture-writing may be of some use in mathematics.
KeywordsSimple Tree Geometric Series Ultimate Source Figurate Series Mathematical Symbol
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