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Expression of type Lambda

from the theory of proveit.physics.quantum.algebra

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 Conditional, Lambda, M, n, x
from proveit.linear_algebra import MatrixMult
from proveit.logic import CartExp, InSet
from proveit.numbers import Complex
In [2]:
# build up the expression from sub-expressions
expr = Lambda(x, Conditional(MatrixMult(M, x), InSet(x, CartExp(Complex, n))))
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())
x \mapsto \left\{M \thinspace x \textrm{ if } x \in \mathbb{C}^{n}\right..
In [5]:
stored_expr.style_options()
no style options
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Lambdaparameter: 10
body: 2
1ExprTuple10
2Conditionalvalue: 3
condition: 4
3Operationoperator: 5
operands: 6
4Operationoperator: 7
operands: 8
5Literal
6ExprTuple9, 10
7Literal
8ExprTuple10, 11
9Variable
10Variable
11Operationoperator: 12
operands: 13
12Literal
13ExprTuple14, 15
14Literal
15Variable