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Expression of type Implies

from the theory of proveit.physics.quantum.QPE

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, k, m
from proveit.logic import Equals, Forall, Implies, InSet
from proveit.numbers import Exp, Mult, Neg, e, frac, i, pi, subtract, two
from proveit.physics.quantum.QPE import _m_domain, _phase, _two_pow_t
In [2]:
# build up the expression from sub-expressions
sub_expr1 = InSet(k, _m_domain)
sub_expr2 = Mult(Exp(e, Neg(frac(Mult(two, pi, i, k, m), _two_pow_t))), Exp(e, Mult(two, pi, i, _phase, k)))
sub_expr3 = Exp(Exp(e, Mult(two, pi, i, subtract(_phase, frac(m, _two_pow_t)))), k)
expr = Implies(Forall(instance_param_or_params = [k], instance_expr = Equals(sub_expr2, sub_expr3), domain = _m_domain), Equals(Lambda(k, Conditional(sub_expr2, sub_expr1)), Lambda(k, Conditional(sub_expr3, sub_expr1))).with_wrapping_at(2)).with_wrapping_at(2)
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())
\begin{array}{c} \begin{array}{l} \left[\forall_{k \in \{0~\ldotp \ldotp~2^{t} - 1\}}~\left(\left(\mathsf{e}^{-\frac{2 \cdot \pi \cdot \mathsf{i} \cdot k \cdot m}{2^{t}}} \cdot \mathsf{e}^{2 \cdot \pi \cdot \mathsf{i} \cdot \varphi \cdot k}\right) = (\mathsf{e}^{2 \cdot \pi \cdot \mathsf{i} \cdot \left(\varphi - \frac{m}{2^{t}}\right)})^{k}\right)\right] \Rightarrow  \\ \left(\begin{array}{c} \begin{array}{l} \left[k \mapsto \left\{\mathsf{e}^{-\frac{2 \cdot \pi \cdot \mathsf{i} \cdot k \cdot m}{2^{t}}} \cdot \mathsf{e}^{2 \cdot \pi \cdot \mathsf{i} \cdot \varphi \cdot k} \textrm{ if } k \in \{0~\ldotp \ldotp~2^{t} - 1\}\right..\right] =  \\ \left[k \mapsto \left\{(\mathsf{e}^{2 \cdot \pi \cdot \mathsf{i} \cdot \left(\varphi - \frac{m}{2^{t}}\right)})^{k} \textrm{ if } k \in \{0~\ldotp \ldotp~2^{t} - 1\}\right..\right] \end{array} \end{array}\right) \end{array} \end{array}
In [5]:
stored_expr.style_options()
namedescriptiondefaultcurrent valuerelated methods
operation'infix' or 'function' style formattinginfixinfix
wrap_positionsposition(s) at which wrapping is to occur; '2 n - 1' is after the nth operand, '2 n' is after the nth operation.()(2)('with_wrapping_at', 'with_wrap_before_operator', 'with_wrap_after_operator', 'without_wrapping', 'wrap_positions')
justificationif any wrap positions are set, justify to the 'left', 'center', or 'right'centercenter('with_justification',)
directionDirection of the relation (normal or reversed)normalnormal('with_direction_reversed', 'is_reversed')
In [6]:
# display the expression information
stored_expr.expr_info()
 core typesub-expressionsexpression
0Operationoperator: 1
operands: 2
1Literal
2ExprTuple3, 4
3Operationoperator: 5
operand: 8
4Operationoperator: 17
operands: 7
5Literal
6ExprTuple8
7ExprTuple9, 10
8Lambdaparameter: 61
body: 11
9Lambdaparameter: 61
body: 12
10Lambdaparameter: 61
body: 14
11Conditionalvalue: 15
condition: 16
12Conditionalvalue: 21
condition: 16
13ExprTuple61
14Conditionalvalue: 22
condition: 16
15Operationoperator: 17
operands: 18
16Operationoperator: 19
operands: 20
17Literal
18ExprTuple21, 22
19Literal
20ExprTuple61, 23
21Operationoperator: 55
operands: 24
22Operationoperator: 67
operands: 25
23Operationoperator: 26
operands: 27
24ExprTuple28, 29
25ExprTuple30, 61
26Literal
27ExprTuple31, 32
28Operationoperator: 67
operands: 33
29Operationoperator: 67
operands: 34
30Operationoperator: 67
operands: 35
31Literal
32Operationoperator: 50
operands: 36
33ExprTuple39, 37
34ExprTuple39, 38
35ExprTuple39, 40
36ExprTuple66, 41
37Operationoperator: 57
operand: 46
38Operationoperator: 55
operands: 43
39Literal
40Operationoperator: 55
operands: 44
41Operationoperator: 57
operand: 48
42ExprTuple46
43ExprTuple69, 59, 60, 53, 61
44ExprTuple69, 59, 60, 47
45ExprTuple48
46Operationoperator: 63
operands: 49
47Operationoperator: 50
operands: 51
48Literal
49ExprTuple52, 66
50Literal
51ExprTuple53, 54
52Operationoperator: 55
operands: 56
53Literal
54Operationoperator: 57
operand: 62
55Literal
56ExprTuple69, 59, 60, 61, 65
57Literal
58ExprTuple62
59Literal
60Literal
61Variable
62Operationoperator: 63
operands: 64
63Literal
64ExprTuple65, 66
65Variable
66Operationoperator: 67
operands: 68
67Literal
68ExprTuple69, 70
69Literal
70Literal