astronomy

Jun-Muk Hwang

Jun-Muk Hwang is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Jun-Muk Hwang rather than just read about it. In short: Jun-Muk Hwang (Korean: 황준묵; born 27 October 1963) is a South Korean mathematician, specializing in algebraic geometry and complex differential geometry. Personal life Hwang is the eldest son of gayageum musician Hwang Byungki and novelist Han Malsook.

Key takeaways

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Reference excerpt

Jun-Muk Hwang (Korean: 황준묵; born 27 October 1963) is a South Korean mathematician, specializing in algebraic geometry and complex differential geometry.

Personal life Hwang is the eldest son of gayageum musician Hwang Byungki and novelist Han Malsook.

Education and career Hwang studied physics at Seoul National University for his bachelors before studying physics at Harvard University. In 1993, he completed his PhD under the direction of Yum-Tong Siu with thesis Global nondeformability of the complex hyper quadric. In the following years he held positions at the University of Notre Dame, the Mathematical Sciences Research Institute, and Seoul National University. Since 1999, he was a professor at the Korea Institute for Advanced Study. He was in 2006 an invited speaker with talk Rigidity of rational homogeneous spaces at the International Congress of Mathematicians (ICM) in Madrid and in 2014 a plenary speaker with talk Mori geometry meets Cartan geometry: Varieties of minimal rational tangents at the ICM in Seoul.

With his collaborator Ngaiming Mok, he has developed the theory of varieties of minimal rational tangents, which combines methods of algebraic geometry and differential geometry in the study of rational curves on algebraic varieties. He has applied this theory to settle a number of problems on algebraic varieties covered by rational curves. In 2020, he was the founding director of the Center for Complex Geometry at the Institute for Basic Science. In 2023, he was selected to be on the committee for the Abel Prize.

Awards and honors 2021: National Academy of Sciences Award, National Academy of Sciences, South Korea 2012: Fellow, American Mathematical Society 2010: National Scientist of the Republic of Korea, Ministry of Education, Science and Technology 2009: Ho-Am Prize in Science, Am Prize, The Ho Am Foundation 2007: Fellow, Korean Academy of Science and Technology 2006: Top Scientist and Technologist Award of Korea, Korean Federation of Science and Technology Societies 2006: Scientist of the Year Award, Korean National Assembly 2001: Korea Science Award, Ministry of Science and Technology 2000: Award for Excellent Article, Korean Mathematical Society

Selected publications Hwang, Jun-Muk (1995). "Nondeformability of the complex hyperquadric". Inventiones Mathematicae. 120 (1). Springer Science and Business Media LLC: 317–338. Bibcode:1995InMat.120..317H. doi:10.1007/bf01241131. ISSN 0020-9910. S2CID 120966973. "Uniruled projective manifolds with irreducible reductive G-structures". Journal für die reine und angewandte Mathematik (Crelle's Journal). 1997 (491). Walter de Gruyter GmbH: 55–64. 1 September 1997. doi:10.1515/crll.1997.490.55. hdl:10722/75184. ISSN 0075-4102. S2CID 118051384. Hwang, Jun-Muk; Mok, Ngaiming (18 February 1998). "Rigidity of irreducible Hermitian symmetric spaces of the compact type under Kähler deformation". Inventiones Mathematicae. 131 (2). Springer Science and Business Media LLC: 393–418. arXiv:math/9604227. Bibcode:1998InMat.131..393H. doi:10.1007/s002220050209. ISSN 0020-9910. S2CID 17138677. Hwang, Jun-Muk; Mok, Ngaiming (18 March 1999). "Holomorphic maps from rational homogeneous spaces of Picard number 1 onto projective manifolds". Inventiones Mathematicae. 136 (1). Springer Science and Business Media LLC: 209–231. Bibcode:1999InMat.136..209H. doi:10.1007/s002220050308. hdl:10722/48602. ISSN 0020-9910. S2CID 122937743. Hwang, Jun-Muk; Mok, Ngaiming (2003). "Finite morphisms onto Fano manifolds of Picard number 1 which have rational curves with trivial normal bundles". Journal of Algebraic Geometry. 12 (4). American Mathematical Society (AMS): 627–651. doi:10.1090/s1056-3911-03-00319-9. hdl:10722/42125. ISSN 1056-3911. S2CID 56059732. HWANG, JUN-MUK; MOK, NGAIMING (2004). "Birationality of the Tangent Map for Minimal Rational Curves". Asian Journal of Mathematics. 8 (1). International Press of Boston: 51–64. arXiv:math/0304101. doi:10.4310/ajm.2004.v8.n1.a6. hdl:10722/75351. ISSN 1093-6106. S2CID 17584597. Hwang, Jun-Muk; Mok, Ngaiming (25 February 2005). "Prolongations of infinitesimal linear automorphisms of projective varieties and rigidity of rational homogeneous spaces of Picard number 1 under Kähler deformation". Inventiones Mathematicae. 160 (3). Springer Science and Business Media LLC: 591–645. Bibcode:2005InMat.160..591H. doi:10.1007/s00222-004-0417-9. hdl:10722/48613. ISSN 0020-9910. S2CID 52237844. Hwang, Jun-Muk (12 August 2008). "Base manifolds for fibrations of projective irreducible symplectic manifolds". Inventiones Mathematicae. 174 (3). Springer Science and Business Media LLC: 625–644. arXiv:0711.3224. Bibcode:2008InMat.174..625H. doi:10.1007/s00222-008-0143-9. ISSN 0020-9910. S2CID 17694524. Fu, Baohua; Hwang, Jun-Muk (8 December 2011). "Classification of non-degenerate projective varieties with non-zero prolongation and application to target rigidity". Inventiones Mathematicae. 189 (2). Springer Science and Business Media LLC: 457–513. arXiv:1011.4751. doi:10.1007/s00222-011-0369-9. ISSN 0020-9910. S2CID 253736967. Hwang, Jun-Muk; Weiss, Richard M. (30 May 2012). "Webs of Lagrangian tori in projective symplectic manifolds". Inventiones Mathematicae. 192 (1). Springer Science and Business Media LLC: 83–109. arXiv:1201.2369. doi:10.1007/s00222-012-0407-2. ISSN 0020-9910. S2CID 253745697.

References

External links "Jun-Muk Hwang (KIAS) / Tangential nondegeneracy of projective varieties I / 2013-11-01". YouTube. 17 January 2018. "Jun-Muk Hwang (KIAS) / Tangential nondegeneracy of projective varieties II / 2013-11-01". YouTube. 17 January 2018. "ICM2014 VideoSeries PL2: Jun-Muk Hwang on Aug14Thu". YouTube. 17 August 2014. (Mori geometry meets Cartan geometry: Varieties of minimal rational tangents) 황준묵 대학교수 - Naver 인물검색

Illustrations

Worked examples

Example 1 — a first encounter with Jun-Muk Hwang

Start with the simplest possible case. Write down what Jun-Muk Hwang claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Jun-Muk Hwang before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Jun-Muk Hwang ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Jun-Muk Hwang

In research: Jun-Muk Hwang appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Jun-Muk Hwang in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Jun-Muk Hwang is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1963 births, 20th-century South Korean mathematicians, 21st-century South Korean mathematicians, so understanding it makes those chapters shorter.
In everyday life: Look for Jun-Muk Hwang outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Jun-Muk Hwang in 20 minutes

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Frequently asked questions

What is Jun-Muk Hwang in simple terms?

Jun-Muk Hwang (Korean: 황준묵; born 27 October 1963) is a South Korean mathematician, specializing in algebraic geometry and complex differential geometry. Personal life Hwang is the eldest son of gayageum musician Hwang Byungki and novelist Han Malsook.

Why does Jun-Muk Hwang matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Jun-Muk Hwang?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Jun-Muk Hwang.