tag:blogger.com,1999:blog-22973357.post6639067600701162123..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Book review: "The Theoretical Minimum" by Susskind and HrabovskySabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger20125tag:blogger.com,1999:blog-22973357.post-1324163192914111692013-02-28T19:00:47.761-05:002013-02-28T19:00:47.761-05:00Most definitely, in context of the book there is a...Most definitely, in context of the book there is always more and not knowing <a href="http://citizenscientistsleague.com/2012/11/21/announcement-the-theoretical-minimum-what-you-need-to-know-to-start-thinking-like-a-physicist/" rel="nofollow">who George Hrabovsky is</a> would definitely help to me to further see the idea of what such a collaboration may mean. <br /><br />So definitely, I am PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-79524890409601156172013-02-28T18:11:28.505-05:002013-02-28T18:11:28.505-05:00To Nemo: There's some additional material in t...To Nemo: There's some additional material in the book but it doesn't come from Leonard Susskind. It's George Hrabovsky that added the introductory calculus and central forces chapters.Anonymoushttps://www.blogger.com/profile/09836836014903442000noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-60440776728659734362013-02-28T11:58:49.830-05:002013-02-28T11:58:49.830-05:00I like the first mathematical part of Roger Penros...I like the first mathematical part of Roger Penrose's book a lot.<br /><br />Concerning the second part starting at about Chapter 19 (The classical fields of Maxwell and Einstein), I would probably not have understood all of it if I had not known about the topics from somewhere else. For example his explanations about LQG and Twistors I did not get, I had to look for a "gentle but Nemohttps://www.blogger.com/profile/15937686207028627202noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-22229771627135953912013-02-27T07:26:44.124-05:002013-02-27T07:26:44.124-05:00Hi Laurent,
At least as far as formal education g...Hi Laurent,<br /><br />At least as far as formal education goes you most likely have more than myself and yet I still appreciate the approach of Penrose, as it can be of some value to nearly anyone who reads it. In fact Penrose offers a way to have it read by which nearly all mathematical solutions can be avoided. From the cursory assessment of Susskind’s book I would agree that for someone Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-20227242678007524132013-02-26T08:42:20.421-05:002013-02-26T08:42:20.421-05:00Yes Phil I fully understand you. I just think that...Yes Phil I fully understand you. I just think that the target audiences of the Susskind/Hrabovsky and Penrose books aren't the same. To really appreciate the Penrose book the reader needs to have some knowledge on functions of complex variables, differential geometry, topological spaces, etc. The Susskind/Hrabovsky just needs some calculus, trigonometry and it's better if the reader knowsAnonymoushttps://www.blogger.com/profile/09836836014903442000noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-39973228303503157702013-02-26T07:28:58.042-05:002013-02-26T07:28:58.042-05:00Laurent,
Thanks for your assessment and yet what...Laurent,<br /><br /><br />Thanks for your assessment and yet what I find as your objection to Penrose’s approach on things are precisely why I like them. That is I find it as important to explore why a method works as to know how and when to have it applied. Then again it might just mark the difference between what you look to have physics have made sense for you and what I happen to. Anyway I Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-13140080956403347902013-02-26T07:01:52.432-05:002013-02-26T07:01:52.432-05:00Hi Bee,
Brevity, I guess there is some merit in ...Hi Bee,<br /><br /><br />Brevity, I guess there is some merit in that yet only as far as not leaving anything important out ;-)<br /><br /><br />“The supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience.”<br /><br /><br />-Albert Einstein, “On the Method of Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-21081710375313378782013-02-25T11:52:17.901-05:002013-02-25T11:52:17.901-05:00Hi Phillip,
Well, if you have the same problem wi...Hi Phillip,<br /><br />Well, if you have the same problem with all blogger blogs, it is clearly not a problem that I can solve. If you cannot find any record of the problem online, it is probably an issue on your end, maybe an overactive firewall/virus protection or an outdated browser version. Best,<br /><br />SabineSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-14915553220894663162013-02-25T09:38:40.935-05:002013-02-25T09:38:40.935-05:00Oops forgot to comment on Sabine's review.
Whe...Oops forgot to comment on Sabine's review.<br />When I was in university we were taugh analytical mechanics in 3rd year. It was introduced only for QM in order to present hamiltonians, commutators, etc. For me the book doesn't fill a gap between high school physics and university physics. If it could have filled a gap for me, it would have been between perhaps the 2nd and 3rd year of Anonymoushttps://www.blogger.com/profile/09836836014903442000noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-49775755838711876082013-02-25T09:23:10.024-05:002013-02-25T09:23:10.024-05:00I normally use Firefox, but when the problem occur...I normally use Firefox, but when the problem occurs it occurs in IE as well. And when it occurs, <i>all</i> Blogger blogs are affected, which makes it pretty clear that it is not a problem at my end. Or, at least, that whatever changed did not change at my end.<br /><br />It might be possible that Blogger periodically changes some global settings which affect some but not all browsers (Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-27742228410271230982013-02-25T08:47:53.892-05:002013-02-25T08:47:53.892-05:00Hi all.
I'm an 40 years old IT engineer but I...Hi all.<br /><br />I'm an 40 years old IT engineer but I've studied non-theoretical physics in university: not much analytical mechanics (only the minimum for QM), not much special relativity, no field theories in general so no general relativity. As you can see I'm not a "pro" like many of you. I really enjoyed the Susskind book. You can read my review and comments to Anonymoushttps://www.blogger.com/profile/09836836014903442000noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-74516327668864605112013-02-25T08:46:29.645-05:002013-02-25T08:46:29.645-05:00Hi Phil,
Well, I never read Penroses book. Let me...Hi Phil,<br /><br />Well, I never read Penroses book. Let me just say that Susskind's has the merit of brevity :o) Best,<br /><br />SabineSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-38987225630117994302013-02-25T07:23:55.443-05:002013-02-25T07:23:55.443-05:00Hi Bee,
Thanks again for taking the time to write...Hi Bee,<br /><br />Thanks again for taking the time to write this review. As it happens the day you’d written this post I was out buying a birthday present for a family member at a store which also had a Chapters book store nearby. Since I had read your review that morning I thought I’d take the opportunity to have a peak at Susskind’s book you mention here to see if it might be of interest. Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-45473919075591003682013-02-25T07:19:22.206-05:002013-02-25T07:19:22.206-05:00This comment has been removed by the author.Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-76459266353072292302013-02-25T03:45:16.650-05:002013-02-25T03:45:16.650-05:00Phillip,
I've asked you before, what browser ...Phillip,<br /><br />I've asked you before, what browser are you using? I'm using Google Chrome and I have no problems neither with this nor with other blogger blogs. It's probably some widget that isn't loading properly, but unless I know which it is I can't tell what's going on. Are you using some privacy protection that might block Google analytics or the stat counter, Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-10720348505805570862013-02-25T03:34:09.201-05:002013-02-25T03:34:09.201-05:00Once again, Blogger blogs force at least some user...Once again, Blogger blogs force at least some users to wait for 10 minutes for the first page to load: "waiting for apis.google.com". This occurs every couple of weeks then goes away.<br />Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-21157978816182803872013-02-24T06:52:35.626-05:002013-02-24T06:52:35.626-05:00I have been trolling the internet for years trying...I have been trolling the internet for years trying to find someone who explains the concept of the Lagrangian to me in an understandable way -- without success UNTIL i checked out Susskind's book on Amazon using the 'Surprise me' feature. It happened to take me to the section explaining what the Lagrangian is about. It blew my mind how accessible he has made it. If only for that bit Celal Biraderhttps://www.blogger.com/profile/01242438141738856391noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-57390333345522069442013-02-23T20:56:17.629-05:002013-02-23T20:56:17.629-05:00Hi Bee,
Along with the book, Leonard Susskind has...Hi Bee,<br /><br />Along with the book, Leonard Susskind has <a href="http://www.youtube.com/watch?v=pyX8kQ-JzHI&feature=share&list=PLF969D3AA9FF3A322" rel="nofollow">many lectures out of Stanford University</a> that may be appealing as well.<br /><br />Best,PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-39412414861778718012013-02-23T08:43:16.640-05:002013-02-23T08:43:16.640-05:00Hi Pedro,
Excellent, the book is yours :o) Please...Hi Pedro,<br /><br />Excellent, the book is yours :o) Please send your mailing address to hossi[at]nordita.org and I'll send it on the way next week. Best,<br /><br />SabineSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-16361602297292973322013-02-23T08:41:34.867-05:002013-02-23T08:41:34.867-05:00Hello Professor Hossenfelder,
I have been follow...Hello Professor Hossenfelder, <br /><br />I have been following your blog for some time. Myself I' m an engineer although in my last years I have working on numerical methods applied to fluid dynamics. The main goal of our research is that the resulting numerical methods we achieve preserve basic physical laws, such as conservation of energy and momentum. <br /><br />As you can see this book Anonymoushttps://www.blogger.com/profile/10437528402484496783noreply@blogger.com