…ying, and justifying, the conditions under which the Cauchy problem is well-posed. There are many well-known cases in which initial conditions fail to settle future/past evolution. However, it is sufficient for us to note that in a great many cases, and in almost all common applications, initial conditions can be chosen so as to guarantee a well-posed Cauchy problem. Soul Physics is authored by Bryan W. Roberts. Thanks for subscribing. Want more S…
Read more…, respectively. Dad gets to sip iced tea in the pool, while Mom gets crayon-on-paper? Where’s Mom’s inner tube? (2007) Then there’s the previous year, when Dad got to go fishin’ with the boy, while Mom got a flower. Ok, flowers can be fun too… (2006) …but two years in a row? While Dad scores a nap in the hammock? (2005) Even more flowers for mom? This year, Dad even got the kids to do his chores. (2004) More flowers for Mom, more relaxing for Dad……
Read more…, when considered as “observables” in classical or quantum physics. How to time reverse a spacetime structure: Origins of the meaning of time reversal for spacetime structures like tensor fields, metrics, and spacetime manifolds. The joy of time reversal invariance: What we know about when a physical system is guaranteed to be temporally symmetric, and what’s special about the physical systems that enjoy this property. The simple failure of Curie’…
Read more…re running completely off the rails. Here’s an example. You put a $229 USD price-tag on an important textbook, Souriau’s (1970) Structure of Dynamical Systems. I’m sure you’ve done the calculation: how many people can be expected buy the textbook at that price? Not many. Not to mention that we could pick up two copies of J. K. Rowling’s “complete works” for this royal sum. This is not dissemination of information. This is you failing the academic…
Read more…big bang. These fluctuations, according to Penrose, should manifest as ever-so-slight deviations in the CMB spectrum. He has suggested that conformally skewing the CMB might make these deviations more visible. Unfortunately, Penrose hasn’t collected enough data to confirm or disconfirm his hypothesis. But it will be very interesting to see how this turns out! Soul Physics is authored by Bryan W. Roberts. Thanks for subscribing. Want more Soul Phys…
Read more