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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, Conditional, m, n
from proveit.linear_algebra import MatrixExp, Unitary
from proveit.logic import And, Forall, InSet
from proveit.numbers import NaturalPos
In [2]:
# build up the expression from sub-expressions
sub_expr1 = Unitary(n)
expr = Conditional(Forall(instance_param_or_params = [A], instance_expr = InSet(MatrixExp(A, m), sub_expr1), domain = sub_expr1), And(InSet(m, NaturalPos), InSet(n, NaturalPos)))
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())
\left\{\forall_{A \in \textrm{U}\left(n\right)}~\left(A^{m} \in \textrm{U}\left(n\right)\right) \textrm{ if } m \in \mathbb{N}^+ ,  n \in \mathbb{N}^+\right..
In [5]:
stored_expr.style_options()
namedescriptiondefaultcurrent valuerelated methods
condition_delimiter'comma' or 'and'commacomma('with_comma_delimiter', 'with_conjunction_delimiter')
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Conditionalvalue: 1
condition: 2
1Operationoperator: 3
operand: 7
2Operationoperator: 5
operands: 6
3Literal
4ExprTuple7
5Literal
6ExprTuple8, 9
7Lambdaparameter: 26
body: 11
8Operationoperator: 18
operands: 12
9Operationoperator: 18
operands: 13
10ExprTuple26
11Conditionalvalue: 14
condition: 15
12ExprTuple27, 16
13ExprTuple28, 16
14Operationoperator: 18
operands: 17
15Operationoperator: 18
operands: 19
16Literal
17ExprTuple20, 21
18Literal
19ExprTuple26, 21
20Operationoperator: 22
operands: 23
21Operationoperator: 24
operand: 28
22Literal
23ExprTuple26, 27
24Literal
25ExprTuple28
26Variable
27Variable
28Variable