Five minor issues & Thank You

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Rolandb

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Jan 1, 2013, 3:09:25 PM1/1/13
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Hi,

One of the real joys of the holiday season is the opportunity to say Thank You to all Sage developers, and to wish them, users and all who are dear and near the very best for the New Year!

 

I noted five minor issues:

 

1)    Developer’s Guide v5.5: typo

Howver, in order to do development in the Sage notebook, including submitting change requests to upstream, we highly recommend installing Git (see below).

 

2)    Output [1,1] of Solve intended?

sage: var('x,y')

sage: print solve([x^2-2*x*y+y^2==7],x,y,solution_dict=True)

([{x: y - sqrt(7)}, {x: y + sqrt(7)}], [1, 1])

 

3)    NZMATH

sage: install_package('nzmath')

sage: from nzmath import *

sage: ecpp.cornacchiamodify(-7,29)

Traceback (most recent call last):

...

ZeroDivisionError: reduction modulo right not defined.


Problem: arith1.modsqrt not an Integer but IntegerMod. N.B.: Updating to NZMATH version 1.2 could be considered too; reference #11421

 

4)    Matrix output still inconsistent with 0.00

Sage: A = matrix([ [-1.0, -1.0, 0.0, 1.0], [1.0, -1.0, -1.0, -2.0] ])
Sage: A.n(2)

[-1.0 -1.0 0.00  1.0]
[ 1.0 -1.0 -1.0 -2.0]

 

5)    Can’t we close http://trac.sagemath.org/sage_trac/ticket/9298?

 

P.S.: As Google allows tags, maybe reserving a name as minor_issues is handy.


Virtualbox 4.2.6; Sage version 5.5ova 


Roland

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