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To specify a non-negative real number in sympy, you can use the sympy.symbols
function to define a symbol and then impose the condition that it is non-negative using the sympy.sympy.functions.elementary.integers
function. For example, you can create a non-negative real number symbol x
as follows:
import sympy
x = sympy.symbols('x', real=True, positive=True)
In this code snippet, the real=True
argument specifies that x
is a real number, and the positive=True
argument imposes the condition that x
must be non-negative. You can now use the symbol x
in your sympy expressions and calculations as a non-negative real number.
How to use non-negative real numbers in sympy equations?
To use non-negative real numbers in SymPy equations, you can define symbols with the assumption of being non-negative using the symbols
function and Assume
class. Here is an example:
from sympy import symbols, Eq from sympy.assumptions.assume import Assume from sympy.assumptions.assume import global_assumptions
Define non-negative real numbers
x = symbols('x', real=True, nonnegative=True) y = symbols('y', real=True, nonnegative=True)
Create an equation using the defined symbols
eq = Eq(x + y, 10)
Print the equation
print(eq)
In this example, we have defined two symbols x
and y
with the assumptions of being real and non-negative. Then we have created an equation x + y = 10
using these symbols. The global assumptions are imported and used in the code to ensure that the symbols are treated as non-negative real numbers in the equation.
How to express a non-negative real value in sympy?
To express a non-negative real value in Sympy, you can use the Symbol
class with the constraints positive=True
and real=True
. Here is an example:
from sympy import Symbol
x = Symbol('x', positive=True, real=True)
This will create a symbol x
that represents a non-negative real value. You can then use this symbol in mathematical expressions in Sympy.
How to assign a non-negative real number to a variable in sympy?
You can assign a non-negative real number to a variable in SymPy by using the sympy.Rational
or sympy.Float
functions.
For example, to assign the value 3.14 to a variable x
, you can do:
import sympy as sp
x = sp.Float(3.14)
Or if you want to assign a non-negative rational number (like 3/4), you can do:
x = sp.Rational(3, 4)
This will ensure that the variable x
is treated as a non-negative real number in SymPy calculations.