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Expression of type Equals

from the theory of proveit.numbers.summation

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 m, x
from proveit.logic import Equals
from proveit.numbers import Add, Exp, Mult, frac, one, subtract, two
In [2]:
# build up the expression from sub-expressions
sub_expr1 = subtract(one, x)
expr = Equals(frac(subtract(one, Exp(x, Add(m, two))), sub_expr1), Mult(frac(one, sub_expr1), subtract(one, Exp(x, Add(two, m)))))
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())
\frac{1 - x^{m + 2}}{1 - x} = \left(\frac{1}{1 - x} \cdot \left(1 - x^{2 + m}\right)\right)
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.()()('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: 12
operands: 5
4Operationoperator: 6
operands: 7
5ExprTuple8, 16
6Literal
7ExprTuple9, 10
8Operationoperator: 34
operands: 11
9Operationoperator: 12
operands: 13
10Operationoperator: 34
operands: 14
11ExprTuple22, 15
12Literal
13ExprTuple22, 16
14ExprTuple22, 17
15Operationoperator: 26
operand: 21
16Operationoperator: 34
operands: 19
17Operationoperator: 26
operand: 24
18ExprTuple21
19ExprTuple22, 23
20ExprTuple24
21Operationoperator: 28
operands: 25
22Literal
23Operationoperator: 26
operand: 31
24Operationoperator: 28
operands: 29
25ExprTuple31, 30
26Literal
27ExprTuple31
28Literal
29ExprTuple31, 32
30Operationoperator: 34
operands: 33
31Variable
32Operationoperator: 34
operands: 35
33ExprTuple37, 36
34Literal
35ExprTuple36, 37
36Literal
37Variable