Happy Mathematics Day

ARYABHATA [476
AD -550 AD]
Place value system and zero
The place-value system, first seen
in the 3rd-century Bakhshali
Manuscript, was clearly in place in
his work. While he did not use a
symbol for zero, the French
mathematician Georges
Ifrah argues that knowledge of
zero was implicit in
Aryabhata's place-value system as
a place holder for the powers of
ten with null coefficients.However,
Aryabhata did not use the Brahmi
numerals. Continuing
the Sanskritic tradition from Vedic
times, he used letters of the
alphabet to denote numbers,
expressing quantities, such as the
table of sines in a mnemonic form.
SHAKUNTALA DEVI
Shakuntala Devi (4 November 1929 – 21
April 2013) was an Indian writer
and mental calculator, popularly known as
the "Human Computer". Devi strove to
simplify numerical calculations for
students. Her talent earned her a place in
the 1982 edition of The Guinness Book of
World Records. However, the certificate for
the record was given posthumously on 30
July 2020, despite Devi achieving her
world record on 18 June 1980 at Imperial
College, London. Devi was a precocious
child and she demonstrated her arithmetic
abilities at the University of
Mysore without any formal education.
Devi wrote a number of books in her later
years, including novels as well as texts
about mathematics, puzzles, and
astrology. She wrote the book The World
of Homosexuals, which is considered the
first study of homosexuality in India. She
saw homosexuality in a positive light and is
considered a pioneer in the field
Srinivasa
Ramanujan
Srinivasa
Ramanujan made
contributions to the
theory of numbers,
including
pioneering discoveries of
the properties of the
partition function. His
papers were published in
English and European
journals, and in 1918 he
was elected to the Royal
Society of London
 VARAHAMIHIRA
1. Varāhamihira (c. 505 - c. 587),also
called Varāha or Mihira, was a Hindu
astronomer and polymath who lived
in Ujjain (Madhya Pradesh, India). He was born
in the Avanti region, roughly corresponding to
modern-day Malwa (part of Madhya Pradesh,
India), to Adityadasa. According to one of his
own works, he was educated at Kapitthaka.
 The Indian tradition believes him to be one of
the "Nine Jewels" (Navaratnas) of the court of
ruler Yashodharman Vikramaditya of Malwa.
Varāhamihira's most notable work was
the Brihat Samhita, an encyclopedic work on
architecture, temples, planetary
motions, eclipses, timekeeping, astrology,
seasons, cloud formation, rainfall, agriculture,
mathematics, gemology, perfumes and many
other topics. According to Varahamihira, in
some verses he was merely summarizing
earlier existing literature on astronomy, Shilpa
Sastra and temple architecture, yet his
presentation of different theories and models
of design are among the earliest texts that have
survived. The chapters of the Brihat
Samhita and verses of Varahamihira were
quoted by the Persian traveler and scholar Al
Biruni
BRAHMAGUPTA
Brahmagupta gave the solution of the
general linear equation in chapter eighteen
of Brahmasphutasiddhānta,
The difference between rupas, when inverted and
divided by the difference of the [coefficients] of
the unknowns, is the unknown in the equation.
The rupas are [subtracted on the side] below that
from which the square and the unknown are to
be subtracted.
Which is a solution for the
equation bx + c = dx + e where rupas refers to the
constants c and e. The solution given is equivalent
to x = e − c/b − d. He further gave two equivalent
solutions to the general quadratic equation
18.44. Diminish by the middle [number] the
square-root of the rupas multiplied by four times
the square and increased by the square of the
middle [number]; divide the remainder by twice
the square. [The result is] the middle [number].
18.45. Whatever is the square-root of
the rupas multiplied by the square [and]
increased by the square of half the unknown,
diminish that by half the unknown [and] divide
[the remainder] by its square. [The result is] the
unknown. which are, respectively, solutions for
the equation ax2 + bx = c 
BHASKARCHARYA
The Siddhānta Shiromani (written in
1150) demonstrates Bhaskara's
knowledge of trigonometry, including
the sine table and relationships
between different trigonometric
functions. He also developed spherical
trigonometry, along with other
interesting trigonometrical results. In
particular Bhaskara seemed more
interested in trigonometry for its own
sake than his predecessors who saw it
only as a tool for calculation. Among
the many interesting results given by
Bhaskara, results found in his works
include computation of sines of angles
of 18 and 36 degrees, and the now
well known formulae for sin [a + b] and
sin [a – b].
PRASANTA CHANDRA
MAHALAONOBIS
 Prasanta Chandra
Mahalanobis, (born
June 29, 1893, Calcutta
[now Kolkata], India—
died June 28, 1972,
Calcutta), Indian
statistician who devised
the Mahalanobis distan
ce and was instrumental
in formulating India's
strategy for
industrialization in the
Second Five-Year Plan
(1956–61).
PRABHU LAL
BHATNAGAR
Prabhu Lal Bhatnagar (8 August 1912 – 5
October 1976), commonly addressed as P. L.
Bhatnagar, was an Indian mathematician
known for his contribution to the Bhatnagar–
Gross–Krook operator used in Lattice
Boltzmann methods (LBM). Prabhu Lal
Bhatnagar was born in Kota in Rajasthan and
was the second of five sons. He did his
schooling in Rampura and later at Herberter
College in Kota. After schooling he went to
Maharajah's College in Jaipur where in 1935
he completed BSc with first rank, followed by
MSc..The Bhatnagar–Gross–Krook
operator (abbreviated BGK operator) term
refers to a collision operator used in
the Boltzmann Equation and in the Lattice
Boltzmann method, a Computational fluid
dynamics technique. It is a relaxation time,
and related to the viscosity.
The operator is named after Prabhu L.
Bhatnagar, Eugene P. Gross, and Max Krook,
the three scientists who introduced it in a
paper in Physical Review in 1954.
DATTATREYA
RAMCHANDRA
KAPREKAR
Dattatreya Ramchandra
Kaprekar (1905–1986) was an
Indian recreational mathematician who
described several classes of natural
numbers including
the Kaprekar, harshad and self numbers
and discovered the Kaprekar's
constant, named after him. Despite
having no formal postgraduate training
and working as a schoolteacher, he
published extensively and became well
known in recreational mathematics
circles. In 1949, Kaprekar discovered an
interesting property of the number
6174, which was subsequently named
the Kaprekar constant.  He showed that
6174 is reached in the limit as one
repeatedly subtracts the highest and
lowest numbers that can be
constructed from a set of four digits
that are not all identical.
LAKKOJU
SANJEEVARAYA
SHARMA
Lakkoju Sanjeevaraya Sharma  (27 November
1907 – 02 December 1998) was an Indian
mathematician. He gave many
mathematical Avadhanams (Ganitavadhanams),
educated people and surprised the elite. Sharma
was born at Kalluru village of Proddatur mandal
in Cuddapah district. His parents were Lakkoju
Pedda Pullaiah and Nagamamba. He was
born blind and had no formal education. He
married Adilakshmamma at 19. He learnt
mathematics when his sister recited what she
learnt at school at home. Sharma gave his first
performance at Andhra Mahasabha at Nandyala
on 15 November 1928, chaired by Sarvepalli
Radhakrishnan. He was invited to New Delhi by 
Jawaharlal Nehru and performed before
President Rajendra Prasad along with other
dignitaries. He traveled widely and gave about
7,000 performances in Andhra Pradesh, Tamil
Nadu, Karnataka, Maharashtra and Delhi. One of
his most memorable performances was on 7
December 1966 at Sri Krishna Devaraya Andhra
Bhasha Nilayam.[2] He received many gold
medals, honors and felicitations.
Sharma prepared an Indian Calendar extending
4,000 years
FAMOUS SAYINGS SHAKUNTALA DEVI
FAMOUS SAYINGS BY SRINIVAS RAMANUJAN