File:Gamma plus sin pi z.svg

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Summary

Description
English: The Gamma function analytically continues the factorial function to non-integers. However it is not unique in this. Here a periodic function which is 0 at the integer values shows how it may be added to the gamma function resulting in another analytic continuation of the factorials.
Date
Source Original png graphic was made by Wolfmankurd and can be found at File:Gamma_plus_sin_pi_z.png
Author Eitanlees
SVG development
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This plot was created with Matplotlib.
Source code
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Python code

import numpy as np
import matplotlib.pyplot as plt
from scipy.special import gamma

lb_x, ub_x = (-4.9, 4.5)
lb_y, ub_y = (-1.2, 5.2)

x = np.linspace(-5, 5, int(1e5))
y = gamma(x)
y[y > 2*ub_y] = np.inf
y[y < lb_y] = -np.inf

g = np.sin(np.pi*x) + y

fig, ax = plt.subplots(figsize=(8,6))
ax.plot(x, y, color = '#2020CE')
ax.plot(x, g, color = '#10CD30')
ax.set(
    xlim=(lb_x, ub_x),
    ylim=(lb_y, ub_y)
)

ax.spines['right'].set_color('none')
ax.spines['top'].set_color('none')
ax.xaxis.set_ticks_position('bottom')
ax.spines['bottom'].set_position(('data',0))
ax.yaxis.set_ticks_position('left')
ax.spines['left'].set_position(('data',0))

ax.grid(True, linestyle='dashed')
plt.show()

Licensing

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w:en:Creative Commons
attribution share alike
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You are free:
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Under the following conditions:
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  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

Captions

A visualization showing how the gamma function is non unique

Items portrayed in this file

depicts

16 July 2019

image/svg+xml

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Date/TimeThumbnailDimensionsUserComment
current19:39, 16 July 2019Thumbnail for version as of 19:39, 16 July 2019576 × 426 (23 KB)EitanleesRemove borders
19:30, 16 July 2019Thumbnail for version as of 19:30, 16 July 2019720 × 540 (24 KB)EitanleesUser created page with UploadWizard
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