The denomination 665 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Founded in 1867 as a Bielefeld sewing machine repair company, AG Dürkoppwerke employed 1, 665 people in 1892 ; it used Waffenamt code " WaA547 " from 1938 to 1939 as the Dürkopp-Werke, and merged with other Bielefeld companies to form Dürkopp Adler AG in 1990.

The gram-force and kilogram-force were never well-defined units until the CGPM adopted a standard acceleration of gravity of 980. 665 cm / s < sup > 2 </ sup > for this purpose in 1901, though they had been used in low-precision measurements of force before that time.

After the case was successfully resolved, Fidelma returned to Cashel ( on the way stopping at the seaport of Genua to visit her old teacher Brother Ruadán and becoming involved in the events of Behold a Pale Horse ) and in 665 became involved in solving the murder of famed religious scholar the Venerable Dacan ( see Suffer Little Children ).

The case of Raymond B. Randolph, Jr. v. Commonwealth of Virginia ( 202 Va. 661, 665 ( 1961 )) would test whether trespassing laws constituted a violation of free speech.

This resulted in the 1987 case " Schumacher, Willner, et al., v. Aldridge of the Air Force Edward C. Aldridge, Jr. 665 F. Supp.

* Leudwinus ( c. 665 – 713 )

* Leudwinus ( c. 665 – 713 )

: 15 – 64 years: 58. 5 % ( male 2, 621, 059 ; female 2, 665, 447 )

* 1999 – The southwestern portion of Oklahoma City, Oklahoma is devastated by an F5 tornado, killing forty-five people, injuring 665, and causing $ 1 billion in damage.

* 666 – Yeon Gaesomun of Goguryeo ( other sources indicate DOD 664 or 665 )

# John Paul II ( 1978 – 2005 ): 26 years, 5 months and 18 days ( 9, 665 days ).

* 25, 665 km < sup > 2 </ sup > – Lake Erie

There is no substantiated written reference for Myra before it was listed as a member of the Lycian alliance ( 168 BC – AD 43 ); according to Strabo ( 14: 665 ) it was one of the largest towns of the alliance.

* Richard A. Muller, Measurement of the lunar impact record for the past 3. 5 billion years, and implications for the Nemesis theory, Geological Society of America Special Paper 356, pp 659 – 665 ( 2002 ). I

" The Mission of the Populist Party ," The North American Review ( Dec 1993 ) v. 157 # 445 pp 665 – 679 ; full text online.

* 665 – After losing the Battle of Baekgang, Kii Castle ( in present day Kiyama ) amassed its defenses to protect Dazaifu.

New York: American Society of Civil Engineers, Hydraulics Division, Book number 665, pp. 352 – 353.

* 20 June – 1994 State of Origin is won by New South Wales in the third and deciding game of the three-match series against Queensland at Lang Park before 40, 665

* Lu Xiangxian ( 陸象先 ; 665 – 736 ), Tang Dynasty official

2004 ): 665 – 674.

* Wealth, by Andrew Carnegie, North American Review Vol. 148, Issue 391 pp. 653 – 665, June 1889.

* 14, 665 ( 1972 – 1973 )

1, pp 653 – 665.

* 1746 – 1747 Bach adds two Chorale preludes ( BWV 664 and 665 ) to his manuscript of the Great Eighteen Chorale Preludes.

Sixty-five of the 600 Class locomotives were built by English Electric between 1950 and 1957, numbered 601 – 665, at either Dick, Kerr & Co. Works ( 601 – 610 ) in Preston or Vulcan Foundry Works ( remainder ) in Newton-le-Willows.

ICL Technical Journal Vol 5 ( 4 ) pp. 665 – 679, 1987.

In 665 – 668 Cenwealh quarreled with Bishop Wini, who sought refuge with the Mercian king Wulfhere, which D. P.

The Drillers held their first home opener at ONEOK Field on April 8, 2010, losing 7 – 0 to the Corpus Christi Hooks in front of an over-capacity crowd of 8, 665.

are 665 of them ), but beyond dimension 25 the Smith-Minkowski-Siegel mass formula implies that the number increases very rapidly with the dimension ; for example, there are more than 80, 000, 000, 000, 000, 000 in dimension 32.

Brahmagupta used negative numbers and zero for computing.

Brahmagupta proved and used a more general identity, equivalent to

The identity was rediscovered by Brahmagupta ( 598 – 668 ), an Indian mathematician and astronomer, who generalized it and used it in his study of what is now erroneously called Pell's equation.

Although Brahmagupta does not explicitly state that these quadrilaterals are cyclic, it is apparent from his rules that this is the case.

Aryabhata ( 476 – 550 ), Brahmagupta ( 598 – 668 ), Albumasar and Al-Sijzi, also proposed that the Earth rotates on its axis.

* 620s – Indian mathematician-astronomer Brahmagupta recognizes gravity as a force of attraction, and briefly describes a law of gravitation

* 628 – Brahmagupta gives methods for calculations of the motions and places of various planets, their rising and setting, conjunctions, and calculations of the solar and lunar eclipses

The Brahmasphutasiddhanta of Brahmagupta ( 598 – 668 ) is the earliest known text to treat zero as a number in its own right and to define operations involving zero.

If the and are real numbers, a more elegant proof is available: the identity expresses the fact that the absolute value of the product of two quaternions is equal to the product of their absolute values, in the same way that the Brahmagupta – Fibonacci two-square identity does for complex numbers.

Brahmagupta (; ) ( 598 – 668 AD ) was an Indian mathematician and astronomer who wrote many important works on mathematics and astronomy.

Edward Saxhau stated that " Brahmagupta, it was he who taught Arabs astronomy ", The famous Abbasid caliph Al-Mansur ( 712 – 775 ) founded Baghdad, which is situated on the banks of the Tigris, and made it a center of learning.

* Brahmagupta – Fibonacci identity

# REDIRECT Brahmagupta – Fibonacci identity

* Brahmagupta – Fibonacci identity

Since the Brahmagupta – Fibonacci identity implies that the product of two integers that can be written as the sum of two squares is itself expressible as the sum of two squares, by applying Fermat's theorem to the prime factorization of any positive integer n, we see that if all of n's odd prime factors congruent to 3 modulo 4 occur to an even exponent, it is expressible as a sum of two squares.

:: This is simply a restatement of the Brahmagupta – Fibonacci identity.