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Stein, Fourier Analysis ํ›„๊ธฐ ๋ฐ ์—ฐ์Šต ๋ฌธ์ œ ํ’€์ด ์ „์—ญ์„ ํ•œ ๋‹ฌ๋„ ์ฑ„ ๋‚จ๊ธฐ์ง€ ์•Š์€ ์ €๋ฒˆ 7์›” ์ดˆ๋ถ€ํ„ฐ Stein, [Fourier Analysis] - Book 1์„ ๊ณต๋ถ€ํ•˜๊ธฐ ์‹œ์ž‘ํ•ด 6์ฃผ๊ฐ€ ์กฐ๊ธˆ ์•ˆ๋˜๋Š” ์‹œ๊ฐ„๋งŒ์— Book 1 ๊ณต๋ถ€๋ฅผ ๋งˆ๋ฌด๋ฆฌ์ง“๋Š”๋‹ค. ๊ธฐ๋ณธ์ ์œผ๋กœ ๋‚ด์šฉ์ด ๋งŽ์ง€ ์•Š๊ธฐ๋„ ํ•œ๋ฐ๋‹ค Stein Book 2 - Complex Analysis๋ฅผ ๊ณต๋ถ€ํ•˜๊ณ  ๋‚˜์„œ Book 1์„ ๋ณด๋‹ˆ ํ›จ์”ฌ ๋” ์‰ฌ์šด ๋А๋‚Œ์ด์—ˆ๋‹ค. [Fourier Analysis]์˜ ์ „์ฒด ์ฑ•ํ„ฐ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค. Chapter 1. The Genesis of Fourier AnalysisChapter 2. Basic Properties of Fourier SeriesCahpter 3. Convergence of Fourier SeriesChapter 4. Some Applications of Fourier .. 2025. 8. 14.
[Fourier Analysis] The Heisenberg uncertainty principle / ํ•˜์ด์  ๋ฒ ๋ฅดํฌ ๋ถˆํ™•์ •์„ฑ ์›๋ฆฌ ์ฐธ๊ณ ๋ฌธํ—Œ : Stein, Elias M., Shakarchi, Rami 2003. Fourier Analysis. Princeton University Press. Stein ํ•ด์„ํ•™ ์‹œ๋ฆฌ์ฆˆ 1๊ถŒ [Fourier Analysis] 5๋‹จ์› Fourier Transfrom on R">R์„ ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ์„ TeX์œผ๋กœ ์ ์–ด ์ •๋ฆฌํ•˜๋Š” ๊น€์— ๋ธ”๋กœ๊ทธ์—๋„ ๊ธ€์„ ์˜ฎ๊ฒจ ์ ๋Š”๋‹ค. ์ฑ…์˜ ๋‚ด์šฉ ์ค‘ ๋ณด์ถฉ์„ค๋ช…์ด ํ•„์š”ํ•œ ๋ถ€๋ถ„ ๊ทธ๋ฆฌ๊ณ  ์ฆ๋ช…์„ ์ƒ๋žตํ•˜๊ณ  ์—ฐ์Šต๋ฌธ์ œ๋กœ ๋„˜๊ธด ๋ช…์ œ๋“ค ์ค‘ ์ผ๋ถ€๋ฅผ ํ•จ๊ป˜ ์„ค๋ช…ํ•˜์˜€๋‹ค. ๋ณธ๋ฌธ์€ PC์— ์ตœ์ ํ™”๋˜์–ด์žˆ๋‹ค. 4. The Heisenberg uncertainty principleTheorem 1. Suppose $\psi$ is a function in $\mathcal{S}$ which satisfies the n.. 2025. 8. 7.
[Fourier Analysis] The Poisson summation formula / ํ‘ธ์•„์†ก ํ•ฉ ๊ณต์‹ ์ฐธ๊ณ ๋ฌธํ—Œ : Stein, Elias M., Shakarchi, Rami 2003. Fourier Analysis. Princeton University Press. Stein ํ•ด์„ํ•™ ์‹œ๋ฆฌ์ฆˆ 1๊ถŒ [Fourier Analysis] 5๋‹จ์› Fourier Transfrom on R์„ ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ์„ TeX์œผ๋กœ ์ ์–ด ์ •๋ฆฌํ•˜๋Š” ๊น€์— ๋ธ”๋กœ๊ทธ์—๋„ ๊ธ€์„ ์˜ฎ๊ฒจ ์ ๋Š”๋‹ค. ์ฑ…์˜ ๋‚ด์šฉ ์ค‘ ๋ณด์ถฉ์„ค๋ช…์ด ํ•„์š”ํ•œ ๋ถ€๋ถ„ ๊ทธ๋ฆฌ๊ณ  ์ฆ๋ช…์„ ์ƒ๋žตํ•˜๊ณ  ์—ฐ์Šต๋ฌธ์ œ๋กœ ๋„˜๊ธด ๋ช…์ œ๋“ค ์ค‘ ์ผ๋ถ€๋ฅผ ํ•จ๊ป˜ ์„ค๋ช…ํ•˜์˜€๋‹ค. ๋ณธ๋ฌธ์€ PC์— ์ตœ์ ํ™”๋˜์–ด์žˆ๋‹ค. Section 2์˜ Applications on some partial differential equations ๋ถ€๋ถ„์€ ๋”ฐ๋กœ TeX์œผ๋กœ ์ •๋ฆฌํ•˜์ง€ ์•Š์•˜๋‹ค. PDE ์ด๋ก ์— ๊ด€์‹ฌ์ด ์žˆ๋Š” ๊ฒƒ๋„ ์•„๋‹ˆ๊ณ  ๋ฌผ๋ฆฌ ๋‚ด์šฉ์ด๋ผ ๊ทธ๋ƒฅ ์†.. 2025. 8. 7.
[Fourier Analysis] The Weierstrass approximation theorem / ๋ฐ”์ด์–ด์ŠˆํŠธ๋ผ์Šค ๊ทผ์‚ฌ์ •๋ฆฌ ์ฐธ๊ณ ๋ฌธํ—Œ : Stein, Elias M., Shakarchi, Rami 2003. Fourier Analysis. Princeton University Press. Stein ํ•ด์„ํ•™ ์‹œ๋ฆฌ์ฆˆ 1๊ถŒ [Fourier Analysis] 5๋‹จ์› Fourier Transfrom on R">R์„ ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ์„ TeX์œผ๋กœ ์ ์–ด ์ •๋ฆฌํ•˜๋Š” ๊น€์— ๋ธ”๋กœ๊ทธ์—๋„ ๊ธ€์„ ์˜ฎ๊ฒจ ์ ๋Š”๋‹ค. ์ฑ…์˜ ๋‚ด์šฉ ์ค‘ ๋ณด์ถฉ์„ค๋ช…์ด ํ•„์š”ํ•œ ๋ถ€๋ถ„ ๊ทธ๋ฆฌ๊ณ  ์ฆ๋ช…์„ ์ƒ๋žตํ•˜๊ณ  ์—ฐ์Šต๋ฌธ์ œ๋กœ ๋„˜๊ธด ๋ช…์ œ๋“ค ์ค‘ ์ผ๋ถ€๋ฅผ ํ•จ๊ป˜ ์„ค๋ช…ํ•˜์˜€๋‹ค. ๋ณธ๋ฌธ์€ PC์— ์ตœ์ ํ™”๋˜์–ด์žˆ๋‹ค. 1.8 The Weierstrass approximation theoremWe have proved the Weierstrass approximation theorem for the continuous func.. 2025. 8. 7.
[Fourier Analysis] The Plancherel formula / ํ”Œ๋ž‘์‰๋  ๊ณต์‹ ์ฐธ๊ณ ๋ฌธํ—Œ : Stein, Elias M., Shakarchi, Rami 2003. Fourier Analysis. Princeton University Press. Stein ํ•ด์„ํ•™ ์‹œ๋ฆฌ์ฆˆ 1๊ถŒ [Fourier Analysis] 5๋‹จ์› Fourier Transfrom on R">R์„ ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ์„ TeX์œผ๋กœ ์ ์–ด ์ •๋ฆฌํ•˜๋Š” ๊น€์— ๋ธ”๋กœ๊ทธ์—๋„ ๊ธ€์„ ์˜ฎ๊ฒจ ์ ๋Š”๋‹ค. ์ฑ…์˜ ๋‚ด์šฉ ์ค‘ ๋ณด์ถฉ์„ค๋ช…์ด ํ•„์š”ํ•œ ๋ถ€๋ถ„ ๊ทธ๋ฆฌ๊ณ  ์ฆ๋ช…์„ ์ƒ๋žตํ•˜๊ณ  ์—ฐ์Šต๋ฌธ์ œ๋กœ ๋„˜๊ธด ๋ช…์ œ๋“ค ์ค‘ ์ผ๋ถ€๋ฅผ ํ•จ๊ป˜ ์„ค๋ช…ํ•˜์˜€๋‹ค. ๋ณธ๋ฌธ์€ PC์— ์ตœ์ ํ™”๋˜์–ด์žˆ๋‹ค. 1.7 The Plancherel formulaProposition 1. If $f, g\in\mathcal{S}$ then(1) $f*g\in \mathcal{S}$(2) $f * g = g * f$(3) .. 2025. 8. 7.
[Fourier Transform] Preliminaries ์ฐธ๊ณ ๋ฌธํ—Œ : Stein, Elias M., Shakarchi, Rami 2003. Fourier Analysis. Princeton University Press. Stein ํ•ด์„ํ•™ ์‹œ๋ฆฌ์ฆˆ 1๊ถŒ [Fourier Analysis] 5๋‹จ์› Fourier Transfrom on $\mathbb{R}$์„ ๊ณต๋ถ€ํ•œ ๋‚ด์šฉ์„ TeX์œผ๋กœ ์ ์–ด ์ •๋ฆฌํ•˜๋Š” ๊น€์— ๋ธ”๋กœ๊ทธ์—๋„ ๊ธ€์„ ์˜ฎ๊ฒจ ์ ๋Š”๋‹ค. ์ฑ…์˜ ๋‚ด์šฉ ์ค‘ ๋ณด์ถฉ์„ค๋ช…์ด ํ•„์š”ํ•œ ๋ถ€๋ถ„ ๊ทธ๋ฆฌ๊ณ  ์ฆ๋ช…์„ ์ƒ๋žตํ•˜๊ณ  ์—ฐ์Šต๋ฌธ์ œ๋กœ ๋„˜๊ธด ๋ช…์ œ๋“ค ์ค‘ ์ผ๋ถ€๋ฅผ ํ•จ๊ป˜ ์„ค๋ช…ํ•˜์˜€๋‹ค. ๋ณธ๋ฌธ์€ PC์— ์ตœ์ ํ™”๋˜์–ด์žˆ๋‹ค. 1.1 Elementary theory for the Fourier transform The most natural extension of integration of continuous funct.. 2025. 8. 5.
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