SymPy Simplification - Learn how to simplify mathematical expressions using SymPy in Python. Discover various techniques and functions for efficient simplification.
假设系统是更强大的工具，支持组合条件约束。比如用withassumptions上下文管理器临时修改假设条件，或者用refine(Q.positive(x))验证条件是否满足。比如验证符号是否为素数，可以用ask(Q.prime(n))返回布尔值，这对需要精确判断的场景很实用。条件表达式适用于需要动态约束的情况。比如用And(x> 0, x <5)创建复合条件...
>>>fromsympyimportSymbol, simplify>>>x = Symbol('x')>>>sqrt(x**2) sqrt(x**2) 看起来应该简化为x,但即使使用simplify()也不会: >>>simplify(sqrt(x**2)) sqrt(x**2) 这是因为如果简化对于x的每一个可能值都不合适,SymPy 将拒绝简化这个表达式。默认情况下,符号x被认为仅代表大致像一个任意...
sympy.assumptions.refine.refine(expr, assumptions=True) 使用假设简化表达式。 解释 与simplify()不同,后者在没有任何假设的情况下执行结构化简化,而此函数将表达式转换为仅在特定假设下有效的形式。请注意,在精炼过程中通常不执行simplify()。 优化布尔表达式涉及将其简化为S.true或S.false。与ask()不同,如果无法...
化简表达式:sympy.simplify(<expr>[,ratio=1.7,measure=count_ops,rational=False,inverse=False,doit=True,**kwargs]) #参数说明: expr:指定原表达式;为sympy.Symbol ratio: measure: rational: inverse: doit: #实例: >>> sympy.simplify((x+1)**2-(x**2+2*x+1)) ...
If .expand() does not help, try simplify(), trigsimp(), etc, which attempt more advanced transformations. For example,>>> from sympy import sin, cos, trigsimp, Symbol >>> x = Symbol("x") >>> trigsimp(cos(x)**2 + sin(x)**2) == 1 True...
because of the assumptions ona,b, andp. If you look at small values, it looks like it might be something worth doing. For example,log(18) == log(2*3**2) == log(2) + 2*log(3). And it would allow things likelog(6) - log(2)to automatically simplify tolog(3), because the...
The ordering will be the same for any numerical coefficients as long as the assumptions tested are correct, otherwise the ordering will not be sorted (but will be canonical). """ a, b, c = f.all_coeffs() dom = f.get_domain() def _simplify(expr): if dom.is_Composite: return ...
If we couldn’t simplify it, there are two cases: The expression is a simple expression: we return the integral, taking care if we are dealing with a Derivative or with a proper DiracDelta. The expression is not simple (i.e. DiracDelta(cos(x))): we can do nothing at all. If the...
'sympy.sets.tests', 'sympy.simplify.tests', 'sympy.solvers.tests', 'sympy.stats.tests', 'sympy.strategies.branch.tests', 'sympy.strategies.tests', 'sympy.tensor.array.tests', 'sympy.tensor.tests', 'sympy.unify.tests', 'sympy.utilities._compilation.tests', ...