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  2. Johann Heinrich Lambert - Wikipedia

    en.wikipedia.org/wiki/Johann_Heinrich_Lambert

    Johann Heinrich Lambert (German: [ˈlambɛɐ̯t], Jean-Henri Lambert in French; 26 or 28 August 1728 – 25 September 1777) was a polymath from the Republic of Mulhouse, generally identified as either Swiss or French, who made important contributions to the subjects of mathematics, physics (particularly optics), philosophy, astronomy and map projections.

  3. Tết - Wikipedia

    en.wikipedia.org/wiki/Tết

    The name Tết is a shortening of Tết Nguyên Đán, literally written as tết (meaning festivals; only used in festival names) and nguyên đán which means the first day of the year. Both words come from Sino-Vietnamese respectively, 節 (SV: tiết) and 元旦. The word for festival is usually lễ hội, a Sino-Vietnamese word, 禮會.

  4. Vietnamese Wikipedia - Wikipedia

    en.wikipedia.org/wiki/Vietnamese_Wikipedia

    November 2002; 21 years ago. ( 2002-11) The Vietnamese Wikipedia ( Vietnamese: Wikipedia tiếng Việt) is the Vietnamese-language edition of Wikipedia, a free, publicly editable, online encyclopedia supported by the Wikimedia Foundation. Like the rest of Wikipedia, its content is created and accessed using the MediaWiki wiki software.

  5. Tiếng gọi thanh niên - Wikipedia

    en.wikipedia.org/wiki/Tiếng_gọi_thanh_niên

    Tiếng gọi thanh niên, or Thanh niên hành khúc ( Saigon: [tʰan niəŋ hân xúk], "March of the Youths"), and originally the March of the Students ( Vietnamese: Sinh Viên Hành Khúc, French: La Marche des Étudiants ), is a famous song of the musician Lưu Hữu Phước . Its lyrics were modified to make the anthem of State of ...

  6. Beer–Lambert law - Wikipedia

    en.wikipedia.org/wiki/Beer–Lambert_law

    The Beer–Lambert law is commonly applied to chemical analysis measurements to determine the concentration of chemical species that absorb light. It is often referred to as Beer's law . In physics , the Bouguer–Lambert law is an empirical law which relates the extinction or attenuation of light to the properties of the material through which ...

  7. Proof that π is irrational - Wikipedia

    en.wikipedia.org/wiki/Proof_that_π_is_irrational

    v. t. e. In the 1760s, Johann Heinrich Lambert was the first to prove that the number π is irrational, meaning it cannot be expressed as a fraction , where and are both integers. In the 19th century, Charles Hermite found a proof that requires no prerequisite knowledge beyond basic calculus.

  8. Vietnamese language - Wikipedia

    en.wikipedia.org/wiki/Vietnamese_language

    Vietnamese (Vietnamese: tiếng Việt) is an Austroasiatic language spoken primarily in Vietnam where it is the national and official language. Vietnamese is spoken natively by around 85 million people, [ 1 ] several times as many as the rest of the Austroasiatic family combined. [ 5 ]

  9. Our Lady of La Vang - Wikipedia

    en.wikipedia.org/wiki/Our_Lady_of_La_Vang

    Our Lady of La Vang (Vietnamese: Đức Mẹ La Vang) refers to a reported Marian apparition at a time when Catholics were persecuted and killed in Vietnam.The Shrine of our Lady of La Vang (Basilica of Our Lady of La Vang) is situated in what is today Hải Phú commune in Hải Lăng District of Quảng Trị Province in Central Vietnam.