logo

Expression of type Forall

from the theory of proveit.numbers.divisibility

In [1]:
import proveit
# Automation is not needed when building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_expr # Load the stored expression as 'stored_expr'
# import Expression classes needed to build the expression
from proveit import a, b, k
from proveit.logic import Forall, NotEquals
from proveit.numbers import Complex, Divides, Mult, zero
In [2]:
# build up the expression from sub-expressions
expr = Forall(instance_param_or_params = [a, b, k], instance_expr = Divides(a, b), domain = Complex, conditions = [Divides(Mult(k, a), Mult(k, b)), NotEquals(k, zero)])
expr:
In [3]:
# check that the built expression is the same as the stored expression
assert expr == stored_expr
assert expr._style_id == stored_expr._style_id
print("Passed sanity check: expr matches stored_expr")
Passed sanity check: expr matches stored_expr
In [4]:
# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())
\forall_{a, b, k \in \mathbb{C}~|~\left(k \cdot a\right) \rvert \left(k \cdot b\right), k \neq 0}~\left(a \rvert b\right)
In [5]:
stored_expr.style_options()
namedescriptiondefaultcurrent valuerelated methods
with_wrappingIf 'True', wrap the Expression after the parametersNoneNone/False('with_wrapping',)
condition_wrappingWrap 'before' or 'after' the condition (or None).NoneNone/False('with_wrap_after_condition', 'with_wrap_before_condition')
wrap_paramsIf 'True', wraps every two parameters AND wraps the Expression after the parametersNoneNone/False('with_params',)
justificationjustify to the 'left', 'center', or 'right' in the array cellscentercenter('with_justification',)
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Operationoperator: 1
operand: 3
1Literal
2ExprTuple3
3Lambdaparameters: 4
body: 5
4ExprTuple31, 33, 32
5Conditionalvalue: 6
condition: 7
6Operationoperator: 20
operands: 8
7Operationoperator: 9
operands: 10
8ExprTuple31, 33
9Literal
10ExprTuple11, 12, 13, 14, 15
11Operationoperator: 18
operands: 16
12Operationoperator: 18
operands: 17
13Operationoperator: 18
operands: 19
14Operationoperator: 20
operands: 21
15Operationoperator: 22
operands: 23
16ExprTuple31, 24
17ExprTuple33, 24
18Literal
19ExprTuple32, 24
20Literal
21ExprTuple25, 26
22Literal
23ExprTuple32, 27
24Literal
25Operationoperator: 29
operands: 28
26Operationoperator: 29
operands: 30
27Literal
28ExprTuple32, 31
29Literal
30ExprTuple32, 33
31Variable
32Variable
33Variable