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49 lines
2.5 KiB
Diff
49 lines
2.5 KiB
Diff
diff --git a/src/sage/interfaces/maxima_abstract.py b/src/sage/interfaces/maxima_abstract.py
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index 961c20aaac..3d601d8939 100644
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--- a/src/sage/interfaces/maxima_abstract.py
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+++ b/src/sage/interfaces/maxima_abstract.py
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@@ -1743,7 +1743,7 @@ class MaximaAbstractElement(ExtraTabCompletion, InterfaceElement):
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sage: y,d = var('y,d')
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sage: f = function('f')
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sage: latex(maxima(derivative(f(x*y), x)))
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- \left(\left.{{{\it \partial}}\over{{\it \partial}\, {\it t_0}}}\,f\left({\it t_0}\right) \right|_{{\it t_0}={\it x}\, {\it y}}\right)\,{\it y}
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+ \left(\left.{{{\it \partial}}\over{{\it \partial}\, {\it t}_{0}}}\,f\left({\it t}_{0}\right) \right|_{{\it t}_{0}={\it x}\, {\it y}}\right)\,{\it y}
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sage: latex(maxima(derivative(f(x,y,d), d,x,x,y)))
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{{{\it \partial}^4}\over{{\it \partial}\,{\it d}\, {\it \partial}\,{\it x}^2\,{\it \partial}\, {\it y}}}\,f\left({\it x} , {\it y} , {\it d}\right)
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sage: latex(maxima(d/(d-2)))
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diff --git a/src/sage/manifolds/differentiable/metric.py b/src/sage/manifolds/differentiable/metric.py
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index 3cd6ad3235..1e18af1a6b 100644
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--- a/src/sage/manifolds/differentiable/metric.py
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+++ b/src/sage/manifolds/differentiable/metric.py
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@@ -993,7 +993,7 @@ class PseudoRiemannianMetric(TensorField):
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2-dimensional differentiable manifold S^2
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sage: g.riemann()[:]
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[[[[0, 0], [0, 0]], [[0, sin(th)^2], [-sin(th)^2, 0]]],
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- [[[0, (cos(th)^2 - 1)/sin(th)^2], [1, 0]], [[0, 0], [0, 0]]]]
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+ [[[0, -1], [1, 0]], [[0, 0], [0, 0]]]]
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In dimension 2, the Riemann tensor can be expressed entirely in terms of
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the Ricci scalar `r`:
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diff --git a/src/sage/symbolic/expression.pyx b/src/sage/symbolic/expression.pyx
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index dfb8751467..27402e54ab 100644
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--- a/src/sage/symbolic/expression.pyx
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+++ b/src/sage/symbolic/expression.pyx
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@@ -7154,7 +7154,7 @@ cdef class Expression(CommutativeRingElement):
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sage: ex = lcm(sin(x)^2 - 1, sin(x)^2 + sin(x)); ex
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(sin(x)^2 + sin(x))*(sin(x)^2 - 1)/(sin(x) + 1)
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sage: ex.simplify_full()
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- -cos(x)^2*sin(x)
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+ sin(x)^3 - sin(x)
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TESTS:
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@@ -10004,7 +10004,7 @@ cdef class Expression(CommutativeRingElement):
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sage: f=tan(3*x)
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sage: f.simplify_trig()
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- (4*cos(x)^2 - 1)*sin(x)/(4*cos(x)^3 - 3*cos(x))
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+ -(4*cos(x)^2 - 1)*sin(x)/(4*cos(x)*sin(x)^2 - cos(x))
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sage: f.simplify_trig(False)
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sin(3*x)/cos(3*x)
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