Series

`Series`

Series()

A series expansion class.

Supports standard arithmetic operations, such as addition and multiplication.

Examples

x = S('x')
s = E("(1-cos(x))/sin(x)").series(x, 0, 4) * x
print(s)

Methods

Name	Description
`__add__`	Add another series or expression to this series, returning the result.
`__getitem__`	Get the coefficient of the term with exponent `exp`.
`__iter__`	Iterate over the terms of the series, yielding pairs of exponent and coefficient.
`__mul__`	Multiply another series or expression to this series, returning the result.
`__neg__`	Negate the series.
`__pow__`	Raise the series to the power of `exp`, returning the result.
`__radd__`	Add two series together, returning the result.
`__rmul__`	Multiply two series together, returning the result.
`__rsub__`	Subtract `self` from `other`, returning the result.
`__rtruediv__`	Divide `other` by `self`, returning the result.
`__str__`	Print the series in a human-readable format.
`__sub__`	Subtract `other` from `self`, returning the result.
`__truediv__`	Divide `self` by `other`, returning the result.
`cos`	Compute the cosine of the series, returning the result.
`exp`	Compute the exponential of the series, returning the result.
`format`	Convert the series into a human-readable string.
`get_absolute_order`	Get the absolute order.
`get_coefficient`	Get the coefficient of the term with exponent `exp`
`get_ramification`	Get the ramification.
`get_relative_order`	Get the relative order.
`get_trailing_exponent`	Get the trailing exponent; the exponent of the first non-zero term.
`log`	Compute the natural logarithm of the series, returning the result.
`pow`	Raise the series to the power of `num/den`, returning the result.
`shift`	Shift the series by `e` units of the ramification.
`sin`	Compute the sine of the series, returning the result.
`spow`	Raise the series to the power of `exp`, returning the result.
`to_expression`	Convert the series to an expression.
`to_latex`	Convert the series into a LaTeX string.

`add`

Series.__add__(other: Series | Expression) -> Series

Add another series or expression to this series, returning the result.

Parameters

other (Series | Expression) The other operand to combine or compare with.

`getitem`

Series.__getitem__(expr: Expression | int) -> Expression

Get the coefficient of the term with exponent exp

Parameters

expr (Expression | int) The expression to operate on.

`iter`

Series.__iter__() -> Iterator[tuple[Expression, Expression]]

Iterate over the terms of the series, yielding pairs of exponent and coefficient.

`mul`

Series.__mul__(other: Series | Expression) -> Series

Multiply another series or expression to this series, returning the result.

Parameters

other (Series | Expression) The other operand to combine or compare with.

`neg`

Series.__neg__() -> Series

Negate the series.

`pow`

Series.__pow__(exp: int) -> Series

Raise the series to the power of exp, returning the result.

Parameters

exp (int) The exponent.

`radd`

Series.__radd__(other: Expression) -> Series

Add two series together, returning the result.

Parameters

other (Expression) The other operand to combine or compare with.

`rmul`

Series.__rmul__(other: Expression) -> Series

Multiply two series together, returning the result.

Parameters

other (Expression) The other operand to combine or compare with.

`rsub`

Series.__rsub__(other: Expression) -> Series

Subtract self from other, returning the result.

Parameters

other (Expression) The other operand to combine or compare with.

`rtruediv`

Series.__rtruediv__(other: Expression) -> Series

Divide other by self, returning the result.

Parameters

other (Expression) The other operand to combine or compare with.

`str`

Series.__str__() -> str

Print the series in a human-readable format.

`sub`

Series.__sub__(other: Series | Expression) -> Series

Subtract other from self, returning the result.

Parameters

other (Series | Expression) The other operand to combine or compare with.

`truediv`

Series.__truediv__(other: Series | Expression) -> Series

Divide self by other, returning the result.

Parameters

other (Series | Expression) The other operand to combine or compare with.

`cos`

Series.cos() -> Series

Compute the cosine of the series, returning the result.

`exp`

Series.exp() -> Series

Compute the exponential of the series, returning the result.

`format`

Series.format(
    mode: PrintMode = PrintMode.Symbolica,
    max_line_length: int | None = 80,
    indentation: int = 4,
    fill_indented_lines: bool = True,
    terms_on_new_line: bool = False,
    color_top_level_sum: bool = True,
    color_builtin_symbols: bool = True,
    bracket_level_colors: Sequence[int] | None = [244, 25, 97, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60],
    print_ring: bool = True,
    symmetric_representation_for_finite_field: bool = False,
    explicit_rational_polynomial: bool = False,
    number_thousands_separator: str | None = None,
    multiplication_operator: str = '*',
    double_star_for_exponentiation: bool = False,
    square_brackets_for_function: bool = False,
    function_brackets: tuple[str, str] = ('(', ')'),
    num_exp_as_superscript: bool = True,
    precision: int | None = None,
    show_namespaces: bool = False,
    hide_namespace: str | None = None,
    include_attributes: bool = False,
    max_terms: int | None = None,
    custom_print_mode: int | None = None,
) -> str

Convert the series into a human-readable string.

Parameters

mode (PrintMode) The mode that controls how the input is interpreted or formatted.
max_line_length (int | None) The preferred maximum line length before wrapping.
indentation (int) The number of spaces used for wrapped lines.
fill_indented_lines (bool) Whether wrapped lines should be padded to the configured indentation.
terms_on_new_line (bool) Whether wrapped output should place terms on separate lines.
color_top_level_sum (bool) Whether top-level sums should be colorized.
color_builtin_symbols (bool) Whether built-in symbols should be colorized.
bracket_level_colors (Sequence[int] | None) The colors assigned to successive nested bracket levels.
print_ring (bool) Whether the coefficient ring should be included in the printed output.
symmetric_representation_for_finite_field (bool) Whether finite-field elements should be printed using symmetric representatives.
explicit_rational_polynomial (bool) Whether rational polynomials should be printed explicitly as numerator and denominator.
number_thousands_separator (str | None) The separator inserted between groups of digits in printed integers.
multiplication_operator (str) The string used to print multiplication.
double_star_for_exponentiation (bool) Whether exponentiation should be printed as ** instead of ^.
square_brackets_for_function (bool) Whether function calls should be printed with square brackets.
function_brackets (tuple[str, str]) The opening and closing brackets used when printing function arguments.
num_exp_as_superscript (bool) Whether small integer exponents should be printed as superscripts.
precision (int | None) The decimal precision used when printing numeric coefficients.
show_namespaces (bool) Whether namespaces should be included in the formatted output.
hide_namespace (str | None) A namespace prefix to omit from printed symbol names.
include_attributes (bool) Whether symbol attributes should be included in the printed output.
max_terms (int | None) The maximum number of terms to print before truncating the output.
custom_print_mode (int | None) A custom print-mode identifier passed through to custom print callbacks.

`get_absolute_order`

Series.get_absolute_order() -> tuple[int, int]

Get the absolute order.

`get_coefficient`

Series.get_coefficient(exp: Expression | int) -> Expression

Get the coefficient of the term with exponent exp. Alternatively, use series[exp].

Parameters

exp (Expression | int) The exponent whose coefficient should be returned.

`get_ramification`

Series.get_ramification() -> int

Get the ramification.

`get_relative_order`

Series.get_relative_order() -> tuple[int, int]

Get the relative order.

`get_trailing_exponent`

Series.get_trailing_exponent() -> tuple[int, int]

Get the trailing exponent; the exponent of the first non-zero term.

`log`

Series.log() -> Series

Compute the natural logarithm of the series, returning the result.

`pow`

Series.pow(num: int, den: int) -> Series

Raise the series to the power of num/den, returning the result.

Parameters

num (int) The numerator of the rational exponent.
den (int) The denominator of the rational exponent.

`shift`

Series.shift(e: int) -> Series

Shift the series by e units of the ramification.

Parameters

e (int) The shift measured in units of the series ramification.

`sin`

Series.sin() -> Series

Compute the sine of the series, returning the result.

`spow`

Series.spow(exp: Series) -> Series

Raise the series to the power of exp, returning the result.

Parameters

exp (Series) The series exponent.

`to_expression`

Series.to_expression() -> Expression

Convert the series to an expression

`to_latex`

Series.to_latex() -> str

Convert the series into a LaTeX string.