logo
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, rho, x
from proveit.linear_algebra import MatrixExp, MatrixMult, ScalarMult
from proveit.logic import Equals
from proveit.numbers import Exp, Mult, e, i, pi, two
In [2]:
# build up the expression from sub-expressions
expr = Conditional(Equals(MatrixMult(MatrixExp(A, m), x), ScalarMult(Exp(e, Mult(two, pi, i, Mult(m, rho))), x)), Equals(MatrixMult(A, x), ScalarMult(Exp(e, Mult(two, pi, i, rho)), x)))
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\{\left(A^{m} \thinspace x\right) = \left(\mathsf{e}^{2 \cdot \pi \cdot \mathsf{i} \cdot \left(m \cdot \rho\right)} \cdot x\right) \textrm{ if } \left(A \thinspace x\right) = \left(\mathsf{e}^{2 \cdot \pi \cdot \mathsf{i} \cdot \rho} \cdot x\right)\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: 4
operands: 3
2Operationoperator: 4
operands: 5
3ExprTuple6, 7
4Literal
5ExprTuple8, 9
6Operationoperator: 12
operands: 10
7Operationoperator: 14
operands: 11
8Operationoperator: 12
operands: 13
9Operationoperator: 14
operands: 15
10ExprTuple16, 19
11ExprTuple17, 19
12Literal
13ExprTuple25, 19
14Literal
15ExprTuple18, 19
16Operationoperator: 20
operands: 21
17Operationoperator: 23
operands: 22
18Operationoperator: 23
operands: 24
19Variable
20Literal
21ExprTuple25, 37
22ExprTuple27, 26
23Literal
24ExprTuple27, 28
25Variable
26Operationoperator: 35
operands: 29
27Literal
28Operationoperator: 35
operands: 30
29ExprTuple32, 33, 34, 31
30ExprTuple32, 33, 34, 38
31Operationoperator: 35
operands: 36
32Literal
33Literal
34Literal
35Literal
36ExprTuple37, 38
37Variable
38Variable