Brahmi numerals are the ancestors of the Hindu-Arabic glyphs, and although mathematicians did not agree on the form of the numerals, most agreed to train themselves with the forms now know as Eaatern Arabic Numerals.
The "Western Arabic" numerals as they were in common use in Europe since the Baroque period have secondarily found worldwide use together with the Latin alphabet, and even significantly beyond the contemporary spread of the Latin alphabet, intruding into the writing systems in regions where other variants of the HinduArabic numerals had been in use, but also in conjunction with Chinese and Japanese writing (see Chinese numerals, Japanese numerals). 
