From 694370db05356b12c931a9bb4baa65a1dc0cfa16 Mon Sep 17 00:00:00 2001 From: bnewbold Date: Tue, 20 Jan 2009 22:21:06 -0500 Subject: daily, minor --- .gitignore | 1 + journal/19jan2009.html | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ main.html | 3 ++- to_athena.sh | 2 +- 4 files changed, 54 insertions(+), 2 deletions(-) create mode 100644 journal/19jan2009.html diff --git a/.gitignore b/.gitignore index be6d468..2f7af04 100644 --- a/.gitignore +++ b/.gitignore @@ -2,6 +2,7 @@ downloads toread sage scheme_stuff +scmutils proposal/bnewbold_8thesis_proposal.skel.pdf *.swp *~ diff --git a/journal/19jan2009.html b/journal/19jan2009.html new file mode 100644 index 0000000..270f527 --- /dev/null +++ b/journal/19jan2009.html @@ -0,0 +1,50 @@ + + +bnewbold thesis + +

+Journal: Jan 19, 2009

+Bryan Newbold, bnewbold@mit.edu
+ +http://web.mit.edu/bnewbold/thesis/ +

+ + + +Finished the Seasoned Schemer yesturday. I've been looking through R5RS, it's +great how short it is! (50 pages) + +From the scmutils manual: +
+Some structures, such as the ones that represent inertia tensors, must +be inverted. (The "m" above may be an inertia tensor!) Division is +arranged to make this work, when possible. The details are too hairy +to explain in this short document. We probably need to write a book +about this! +
+Indeed! +

+I also liked this quote from Sean Carrol's Spacetime and Geometry (p485): +
+The nice property of tensors, that there is usually only one sensible thing to do based on index placement, is of great help here." +
+Sounds like a call for computation? +
+I've been working on a sage/scheme interface a bit. The problem i'm running +into now is disabling the interrupt REPL in MIT/GNU Scheme; I just want it to +leave an error string and drop back to the base REPL. I could edit the pexpect +routines in sage to try and catch all the pretinent interrupt strings, but +I think it would be better to just have the error interrupt hook in scheme +do the simple thing. +
+For now, i'm actually going to switch over to the "scm" scheme distribution +which is much simpler and get that going well with sage, then try MIT/GNU +scheme again. +

+(previous entry + + + + + diff --git a/main.html b/main.html index abfe520..9d6e834 100644 --- a/main.html +++ b/main.html @@ -45,7 +45,8 @@ bryannewbold.com/cal.

do it, after this point I shouldn't be focusing on the software tools as much. Jan 19-26? - Work through "Functional Differential Geometry", rewriting by hand + Work through "Functional Differential Geometry", writing out + examples by hand Jan 31 By this date have a proposed outline with length estimates so I can sanity check with somebody in the physics department. diff --git a/to_athena.sh b/to_athena.sh index 81c7d98..99299a1 100755 --- a/to_athena.sh +++ b/to_athena.sh @@ -1,3 +1,3 @@ #!/bin/sh -scp -r main.html journal README bnewbold@linux.mit.edu:thesis/ +scp -r main.html journal other README bnewbold@linux.mit.edu:thesis/ -- cgit v1.2.3