A very important confession on Small_Pox by a British physician JZ Holwell (FRS) about how Brahmins went from village to village to inoculate against Small_Pox & hardly One in Million failed. And, the spread happened after British banned this in wake of Jenner Vaccination.

An Arab account of Indian genius in ancient ages by a Syrian Missionary in 602 CE...
He explicitly says that Greeks would do well to see the Indian discoveries on astronomy, computing...

During Al Mansur times Brahmaspuhta-Siddhanta Of Brahmagupta, Khandakadhyaya & Aryabhatiya of Aryabhatt was translated by al Fazari, was called “Great SindHind” !
Arabs called Indians Mathematics as HindSat or Hindu Art !

European Mathematics was primitive.
Indians knew of numbers 10 raised to power 53 in early Christian age. Contrasting with Dante ‘Divinia Comedia’. Pascal & Newton held that Sq Rt Of 3 wasn’t a genuine arithmetical number. Even -ve numbers not accepted.

Irrational numbers
Fibonacci series
Pascal’ Triangle
Indeterminate analysis
Infinite,Transinfinite numbers
Binomial theorem... now attributed to Europeans were all known to South Asian (Indian) tradition.
Sulbhasutras, Vedas speak of Irrational numbers.