Parsevaln.¹

Brit.

/ˈpɑːsᵻv(a)l/, U.S.

/ˈpɑrsəv(ə)l/

Forms: 1900s– Parsefal, 1900s– Parseval.

Origin: From a proper name. Etymon: proper name Parseval.

Etymology: < the name of August von Parseval (1861–1942), German military engineer, who invented this type of airship. Compare Zeppelin n.Parseval began developing the airship in 1901 with H. B. von Sigsfeld. After Sigsfeld's death in 1902, work was interrupted until 1905. The airship was first launched in 1906.

Now historical.

A type of non-rigid dirigible German airship.

ΘΚΠ

society > travel > air or space travel > a means of conveyance through the air > balloons and airships > [noun] > airship > types of airship

aeroplane1884

non-rigid1909

Parseval1909

rigid1911

blimp1916

submarine scout1917

semi-rigid1920

1908 W. H. Story tr. A. Hildebrandt Airships viii. 85 (caption) Major Parseval's dirigible balloon [Ger. der lenbare Ballon des Major von Parseval].]

1909 Chambers's Jrnl. Oct. 660/2 At present the airship fleet consists of three Zeppelins, three Parsefals, and two Gross dirigibles.

1931 C. St. J. Sprigg Airship viii. 106 In its final form the Parseval was not much smaller than the early Zeppelins, and was of a good streamline shape.

1957 Encycl. Brit. I. 465/1 Maj. August von Parseval in 1906 constructed for the German army the first in a series of some 28 Parseval pressure type airships which were built from that date until 1929.

1971 R. Jackson Airships v. 112 On the outbreak of war, the Astra-Torres and the Parseval were immediately allocated to coastal patrol duties.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

Parsevaln.²

Brit.

/ˈpɑːsᵻv(a)l/, U.S.

/ˈpɑrsəv(ə)l/

Origin: From a proper name. Etymon: proper name Parseval.

Etymology: < the name of Marc-Antoine Parseval des Chênes (1755–1836), French mathematician, who proposed the theorem in 1799 (published in 1806 in Mém. Inst. des Sci., Lettres et Arts: Sci. Math. et Physiques 1 639).

Mathematics.

attributive and in the genitive. Designating (any of various forms of) a theorem which relates the integral of a product of two periodic functions to the sum of the products of their respective Fourier coefficients; spec. a form of the theorem in which the two periodic functions are taken to be equal, i.e. giving an expression for the integral of the square of a periodic function. Esp. in Parseval's formula, Parseval's theorem.

ΚΠ

1911 Proc. Royal Soc. A. 85 401 The theorem commonly known as Parseval's theorem..must be regarded as one of the most important results in the whole history of the Fourier series.

1939 E. C. Titchmarsh Theory of Functions (ed. 2) xii. 423 Parseval's formula therefore holds if the series is summed (C, 1).

1968 E. T. Copson Metric Spaces vii. 89 By Parseval's Theorem, the sequence..of Fourier co-efficients belongs to l².

1998 Ann. Numerical Math. 4 143 (title) The approximate sampling theorem, Poisson's sum formula, a decomposition theorem for Parseval's equation and their interconnections.

This is a new entry (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	parseval
释义	Parsevaln.¹ Brit. /ˈpɑːsᵻv(a)l/, U.S. /ˈpɑrsəv(ə)l/ Forms: 1900s– Parsefal, 1900s– Parseval. Origin: From a proper name. Etymon: proper name Parseval. Etymology: < the name of August von Parseval (1861–1942), German military engineer, who invented this type of airship. Compare Zeppelin n.Parseval began developing the airship in 1901 with H. B. von Sigsfeld. After Sigsfeld's death in 1902, work was interrupted until 1905. The airship was first launched in 1906. Now historical. A type of non-rigid dirigible German airship. ΘΚΠ society > travel > air or space travel > a means of conveyance through the air > balloons and airships > [noun] > airship > types of airship aeroplane1884 non-rigid1909 Parseval1909 rigid1911 blimp1916 submarine scout1917 semi-rigid1920 1908 W. H. Story tr. A. Hildebrandt Airships viii. 85 (caption) Major Parseval's dirigible balloon [Ger. der lenbare Ballon des Major von Parseval].] 1909 Chambers's Jrnl. Oct. 660/2 At present the airship fleet consists of three Zeppelins, three Parsefals, and two Gross dirigibles. 1931 C. St. J. Sprigg Airship viii. 106 In its final form the Parseval was not much smaller than the early Zeppelins, and was of a good streamline shape. 1957 Encycl. Brit. I. 465/1 Maj. August von Parseval in 1906 constructed for the German army the first in a series of some 28 Parseval pressure type airships which were built from that date until 1929. 1971 R. Jackson Airships v. 112 On the outbreak of war, the Astra-Torres and the Parseval were immediately allocated to coastal patrol duties. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). Parsevaln.² Brit. /ˈpɑːsᵻv(a)l/, U.S. /ˈpɑrsəv(ə)l/ Origin: From a proper name. Etymon: proper name Parseval. Etymology: < the name of Marc-Antoine Parseval des Chênes (1755–1836), French mathematician, who proposed the theorem in 1799 (published in 1806 in Mém. Inst. des Sci., Lettres et Arts: Sci. Math. et Physiques 1 639). Mathematics. attributive and in the genitive. Designating (any of various forms of) a theorem which relates the integral of a product of two periodic functions to the sum of the products of their respective Fourier coefficients; spec. a form of the theorem in which the two periodic functions are taken to be equal, i.e. giving an expression for the integral of the square of a periodic function. Esp. in Parseval's formula, Parseval's theorem. ΚΠ 1911 Proc. Royal Soc. A. 85 401 The theorem commonly known as Parseval's theorem..must be regarded as one of the most important results in the whole history of the Fourier series. 1939 E. C. Titchmarsh Theory of Functions (ed. 2) xii. 423 Parseval's formula therefore holds if the series is summed (C, 1). 1968 E. T. Copson Metric Spaces vii. 89 By Parseval's Theorem, the sequence..of Fourier co-efficients belongs to l². 1998 Ann. Numerical Math. 4 143 (title) The approximate sampling theorem, Poisson's sum formula, a decomposition theorem for Parseval's equation and their interconnections. This is a new entry (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.¹1909n.²1911
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Parsevaln.1

Parsevaln.2

Parsevaln.¹

Parsevaln.²