2016.06.07 13:06
2016.06.07 13:10
2016.06.07 13:42
No. | Subject | Date | Author | Last Update | Views |
---|---|---|---|---|---|
Notice | How to write your comments onto a webpage [2] | 2016.07.06 | 운영자 | 2016.11.20 | 18165 |
Notice | How to Upload Pictures in webpages | 2016.07.06 | 운영자 | 2018.10.19 | 32306 |
Notice | How to use Rich Text Editor [3] | 2016.06.28 | 운영자 | 2018.10.19 | 5890 |
Notice | How to Write a Webpage | 2016.06.28 | 운영자 | 2020.12.23 | 43810 |
8842 | 영화 Out of Africa...Stay with me till the morning/Dana Winner | 2005.03.13 | jinsoo | 2005.03.13 | 13237 |
8841 | [re] A Memory of Africa with a song | 2005.03.14 | Steven Kim | 2005.03.14 | 7622 |
8840 | 봄이 오면 | 2005.03.24 | 이한중 | 2005.03.24 | 7757 |
8839 | 코리아 여! [8] | 2005.03.25 | 이 한 중 | 2016.06.16 | 7622 |
8838 | Rumination over pictures of old faces from Orlando [2] | 2005.03.27 | Oun Kwon 권 오 언 | 2016.06.15 | 7795 |
8837 | 제비 - La Golondrina (노래감상) [1] | 2005.03.29 | Steven Kim | 2005.03.29 | 9301 |
8836 | 복 수 초 [7] | 2005.03.29 | 오세윤 | 2005.03.29 | 7346 |
8835 | 진달래 꽃 (素月의 詩와 인생) [3] | 2005.04.02 | Steven Kim | 2005.04.02 | 7597 |
8834 | [시해설] 김소월 : 진달래꽃 [4] | 2005.04.03 | 김 원호 | 2005.04.03 | 9190 |
8833 | Golfing with Friends [9] | 2005.04.03 | 이 한 중 | 2005.04.03 | 7289 |
8832 | [re] Golfing with Friends [4] | 2005.04.04 | jinsoo | 2005.04.04 | 6911 |
8831 | 조금씩 아름다워 지는 사람(퍼옴) [1] | 2005.04.05 | 석주 | 2005.04.05 | 7892 |
8830 | [re] 조금씩 아름다워 지는 사람 [5] | 2005.04.05 | jinsoo | 2005.04.05 | 7059 |
8829 | L'amour, c'est pour rien! [5] | 2005.04.05 | 通信兵 | 2005.04.05 | 7659 |
8828 | 징 검 다리 - 오세윤 [3] | 2005.04.10 | 오세윤 | 2016.06.17 | 7339 |
8827 | [시 감상] 행복 - 유치환 [5] | 2005.04.13 | kyu hwang | 2005.04.13 | 8144 |
8826 | 좋은 친구는 인생에서 가장 큰 보배 [5] | 2005.04.16 | 물안개 | 2005.04.16 | 6378 |
8825 | 어머니 (법정스님의 글) [2] | 2005.04.16 | 一水去士 | 2016.06.17 | 7007 |
8824 | [re] 어머니 만나고 온 날 [3] | 2005.04.16 | 물안개 | 2005.04.16 | 7003 |
8823 | 그립다 말을 할까 [6] | 2005.04.17 | 오세윤 | 2005.04.17 | 6969 |
The no-hair theorem postulates that all black hole solutions of the Einstein-Maxwell equations of gravitation and electromagnetism in general relativity can be completely characterized by only three externally observable classical parameters: mass, electric charge, and angular momentum.[1] All other information (for which "hair" is a metaphor) about the matter which formed a black hole or is falling into it, "disappears" behind the black-hole event horizon and is therefore permanently inaccessible to external observers. Physicist John Archibald Wheeler expressed this idea with the phrase "black holes have no hair"[1] which was the origin of the name. In a later interview, John Wheeler says that Jacob Bekenstein coined this phrase.[2]
The first version of the no-hair theorem for the simplified case of the uniqueness of the Schwarzschild metric was shown by Werner Israel in 1967.[3] The result was quickly generalized to the cases of charged or spinning black holes.[4][5] There is still no rigorous mathematical proof of a general no-hair theorem, and mathematicians refer to it as the no-hair conjecture. Even in the case of gravity alone (i.e., zero electric fields), the conjecture has only been partially resolved by results of Stephen Hawking, Brandon Carter, and David C. Robinson, under the additional hypothesis of non-degenerate event horizons and the technical, restrictive and difficult-to-justify assumption of real analyticity of the space-time continuum.(from Internet)