K. notation in Python 2
4
In one example of Sage math (search for octahedral) there is this line:
K.<v> = sage.groups.matrix_gps.finitely_generated.CyclotomicField(10)
What does this .<v> do?
python python-2.7 sage
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
|
show 2 more comments
4
In one example of Sage math (search for octahedral) there is this line:
K.<v> = sage.groups.matrix_gps.finitely_generated.CyclotomicField(10)
What does this .<v> do?
python python-2.7 sage
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
4
Can you link to the example? That doesn't look like anything Python I'm familiar with.
– Mad Physicist
Jan 2 at 18:07
2
I'm fairly certain that would be a SyntaxError in any version Python.
– juanpa.arrivillaga
Jan 2 at 18:09
4
"SageMath is a free open-source mathematics software system [...]. Access their combined power through a common, Python-based language" - i.e. not bare Python directly.
– melpomene
Jan 2 at 18:10
2
I have never even heard of this However 2 mins of reading the documentation describes this asWe can specify a different generator name as follows. sovwould be the generator name returned byk.gen(). I would suggest to read the documentation.
– Chris Doyle
Jan 2 at 18:14
2
doc.sagemath.org/html/en/reference/repl/sage/repl/… looks relevant.
– melpomene
Jan 2 at 18:18
|
show 2 more comments
4
4
4
In one example of Sage math (search for octahedral) there is this line:
K.<v> = sage.groups.matrix_gps.finitely_generated.CyclotomicField(10)
What does this .<v> do?
python python-2.7 sage
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
In one example of Sage math (search for octahedral) there is this line:
K.<v> = sage.groups.matrix_gps.finitely_generated.CyclotomicField(10)
What does this .<v> do?
python python-2.7 sage
python python-2.7 sage
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
edited Jan 2 at 18:19
Martin Ueding
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
asked Jan 2 at 18:05
Martin UedingMartin Ueding
3,72133155
3,72133155
4
Can you link to the example? That doesn't look like anything Python I'm familiar with.
– Mad Physicist
Jan 2 at 18:07
2
I'm fairly certain that would be a SyntaxError in any version Python.
– juanpa.arrivillaga
Jan 2 at 18:09
4
"SageMath is a free open-source mathematics software system [...]. Access their combined power through a common, Python-based language" - i.e. not bare Python directly.
– melpomene
Jan 2 at 18:10
2
I have never even heard of this However 2 mins of reading the documentation describes this asWe can specify a different generator name as follows. sovwould be the generator name returned byk.gen(). I would suggest to read the documentation.
– Chris Doyle
Jan 2 at 18:14
2
doc.sagemath.org/html/en/reference/repl/sage/repl/… looks relevant.
– melpomene
Jan 2 at 18:18
|
show 2 more comments
4
Can you link to the example? That doesn't look like anything Python I'm familiar with.
– Mad Physicist
Jan 2 at 18:07
2
I'm fairly certain that would be a SyntaxError in any version Python.
– juanpa.arrivillaga
Jan 2 at 18:09
4
"SageMath is a free open-source mathematics software system [...]. Access their combined power through a common, Python-based language" - i.e. not bare Python directly.
– melpomene
Jan 2 at 18:10
2
I have never even heard of this However 2 mins of reading the documentation describes this asWe can specify a different generator name as follows. sovwould be the generator name returned byk.gen(). I would suggest to read the documentation.
– Chris Doyle
Jan 2 at 18:14
2
doc.sagemath.org/html/en/reference/repl/sage/repl/… looks relevant.
– melpomene
Jan 2 at 18:18
4
4
Can you link to the example? That doesn't look like anything Python I'm familiar with.
– Mad Physicist
Jan 2 at 18:07
Can you link to the example? That doesn't look like anything Python I'm familiar with.
– Mad Physicist
Jan 2 at 18:07
2
2
I'm fairly certain that would be a SyntaxError in any version Python.
– juanpa.arrivillaga
Jan 2 at 18:09
I'm fairly certain that would be a SyntaxError in any version Python.
– juanpa.arrivillaga
Jan 2 at 18:09
4
4
"SageMath is a free open-source mathematics software system [...]. Access their combined power through a common, Python-based language" - i.e. not bare Python directly.
– melpomene
Jan 2 at 18:10
"SageMath is a free open-source mathematics software system [...]. Access their combined power through a common, Python-based language" - i.e. not bare Python directly.
– melpomene
Jan 2 at 18:10
2
2
I have never even heard of this However 2 mins of reading the documentation describes this as
We can specify a different generator name as follows. so v would be the generator name returned by k.gen(). I would suggest to read the documentation.– Chris Doyle
Jan 2 at 18:14
I have never even heard of this However 2 mins of reading the documentation describes this as
We can specify a different generator name as follows. so v would be the generator name returned by k.gen(). I would suggest to read the documentation.– Chris Doyle
Jan 2 at 18:14
2
2
doc.sagemath.org/html/en/reference/repl/sage/repl/… looks relevant.
– melpomene
Jan 2 at 18:18
doc.sagemath.org/html/en/reference/repl/sage/repl/… looks relevant.
– melpomene
Jan 2 at 18:18
|
show 2 more comments
1 Answer
1
active
oldest
votes
5
SageMath code is not Python, albeit very similar. The syntax
A.<b> = C(d, e, f)
in SageMath is roughly equivalent to the following Python code
A = C(d, e, f, names=('b',))
b = A.gen()
I.e., first the parent ring A is created, with generator named 'b', then a variable b is initialized to the generator of A.
You can see what any SageMath statement is translated to using the function preparse():
sage: preparse('A.<b> = C(d, e, f)')
"A = C(d, e, f, names=('b',)); (b,) = A._first_ngens(1)"
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
1
The author of this grammar (I don't mean the author of this answer) needs exorcism.
– ElmoVanKielmo
Jan 3 at 7:18
1
This grammar was inspired by the Magma user language. The preparser hack is nasty, but I don't see what's bad in the grammar per se.
– Luca De Feo
Jan 4 at 11:16
2
This - the preparser hack is nasty.
– ElmoVanKielmo
Jan 7 at 4:43
Well, depends on what you mean by nasty. In this case, the desire to have something users would instantly be familiar with overrode nasty.
– kcrisman
Feb 1 at 2:46
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
5
SageMath code is not Python, albeit very similar. The syntax
A.<b> = C(d, e, f)
in SageMath is roughly equivalent to the following Python code
A = C(d, e, f, names=('b',))
b = A.gen()
I.e., first the parent ring A is created, with generator named 'b', then a variable b is initialized to the generator of A.
You can see what any SageMath statement is translated to using the function preparse():
sage: preparse('A.<b> = C(d, e, f)')
"A = C(d, e, f, names=('b',)); (b,) = A._first_ngens(1)"
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
1
The author of this grammar (I don't mean the author of this answer) needs exorcism.
– ElmoVanKielmo
Jan 3 at 7:18
1
This grammar was inspired by the Magma user language. The preparser hack is nasty, but I don't see what's bad in the grammar per se.
– Luca De Feo
Jan 4 at 11:16
2
This - the preparser hack is nasty.
– ElmoVanKielmo
Jan 7 at 4:43
Well, depends on what you mean by nasty. In this case, the desire to have something users would instantly be familiar with overrode nasty.
– kcrisman
Feb 1 at 2:46
add a comment |
5
SageMath code is not Python, albeit very similar. The syntax
A.<b> = C(d, e, f)
in SageMath is roughly equivalent to the following Python code
A = C(d, e, f, names=('b',))
b = A.gen()
I.e., first the parent ring A is created, with generator named 'b', then a variable b is initialized to the generator of A.
You can see what any SageMath statement is translated to using the function preparse():
sage: preparse('A.<b> = C(d, e, f)')
"A = C(d, e, f, names=('b',)); (b,) = A._first_ngens(1)"
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
1
The author of this grammar (I don't mean the author of this answer) needs exorcism.
– ElmoVanKielmo
Jan 3 at 7:18
1
This grammar was inspired by the Magma user language. The preparser hack is nasty, but I don't see what's bad in the grammar per se.
– Luca De Feo
Jan 4 at 11:16
2
This - the preparser hack is nasty.
– ElmoVanKielmo
Jan 7 at 4:43
Well, depends on what you mean by nasty. In this case, the desire to have something users would instantly be familiar with overrode nasty.
– kcrisman
Feb 1 at 2:46
add a comment |
5
5
5
SageMath code is not Python, albeit very similar. The syntax
A.<b> = C(d, e, f)
in SageMath is roughly equivalent to the following Python code
A = C(d, e, f, names=('b',))
b = A.gen()
I.e., first the parent ring A is created, with generator named 'b', then a variable b is initialized to the generator of A.
You can see what any SageMath statement is translated to using the function preparse():
sage: preparse('A.<b> = C(d, e, f)')
"A = C(d, e, f, names=('b',)); (b,) = A._first_ngens(1)"
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
SageMath code is not Python, albeit very similar. The syntax
A.<b> = C(d, e, f)
in SageMath is roughly equivalent to the following Python code
A = C(d, e, f, names=('b',))
b = A.gen()
I.e., first the parent ring A is created, with generator named 'b', then a variable b is initialized to the generator of A.
You can see what any SageMath statement is translated to using the function preparse():
sage: preparse('A.<b> = C(d, e, f)')
"A = C(d, e, f, names=('b',)); (b,) = A._first_ngens(1)"
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
answered Jan 2 at 22:35
Luca De FeoLuca De Feo
506311
506311
1
The author of this grammar (I don't mean the author of this answer) needs exorcism.
– ElmoVanKielmo
Jan 3 at 7:18
1
This grammar was inspired by the Magma user language. The preparser hack is nasty, but I don't see what's bad in the grammar per se.
– Luca De Feo
Jan 4 at 11:16
2
This - the preparser hack is nasty.
– ElmoVanKielmo
Jan 7 at 4:43
Well, depends on what you mean by nasty. In this case, the desire to have something users would instantly be familiar with overrode nasty.
– kcrisman
Feb 1 at 2:46
add a comment |
1
The author of this grammar (I don't mean the author of this answer) needs exorcism.
– ElmoVanKielmo
Jan 3 at 7:18
1
This grammar was inspired by the Magma user language. The preparser hack is nasty, but I don't see what's bad in the grammar per se.
– Luca De Feo
Jan 4 at 11:16
2
This - the preparser hack is nasty.
– ElmoVanKielmo
Jan 7 at 4:43
Well, depends on what you mean by nasty. In this case, the desire to have something users would instantly be familiar with overrode nasty.
– kcrisman
Feb 1 at 2:46
1
1
The author of this grammar (I don't mean the author of this answer) needs exorcism.
– ElmoVanKielmo
Jan 3 at 7:18
The author of this grammar (I don't mean the author of this answer) needs exorcism.
– ElmoVanKielmo
Jan 3 at 7:18
1
1
This grammar was inspired by the Magma user language. The preparser hack is nasty, but I don't see what's bad in the grammar per se.
– Luca De Feo
Jan 4 at 11:16
This grammar was inspired by the Magma user language. The preparser hack is nasty, but I don't see what's bad in the grammar per se.
– Luca De Feo
Jan 4 at 11:16
2
2
This - the preparser hack is nasty.
– ElmoVanKielmo
Jan 7 at 4:43
This - the preparser hack is nasty.
– ElmoVanKielmo
Jan 7 at 4:43
Well, depends on what you mean by nasty. In this case, the desire to have something users would instantly be familiar with overrode nasty.
– kcrisman
Feb 1 at 2:46
Well, depends on what you mean by nasty. In this case, the desire to have something users would instantly be familiar with overrode nasty.
– kcrisman
Feb 1 at 2:46
add a comment |
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4
Can you link to the example? That doesn't look like anything Python I'm familiar with.
– Mad Physicist
Jan 2 at 18:07
2
I'm fairly certain that would be a SyntaxError in any version Python.
– juanpa.arrivillaga
Jan 2 at 18:09
4
"SageMath is a free open-source mathematics software system [...]. Access their combined power through a common, Python-based language" - i.e. not bare Python directly.
– melpomene
Jan 2 at 18:10
2
I have never even heard of this However 2 mins of reading the documentation describes this as
We can specify a different generator name as follows. sovwould be the generator name returned byk.gen(). I would suggest to read the documentation.– Chris Doyle
Jan 2 at 18:14
2
doc.sagemath.org/html/en/reference/repl/sage/repl/… looks relevant.
– melpomene
Jan 2 at 18:18