1 <?xml version=
"1.0" encoding=
"utf-8"?>
2 <svg:svg xmlns=
"http://www.w3.org/1998/Math/MathML" xmlns:
svg=
"http://www.w3.org/2000/svg" height=
"27.958673pt" width=
"311.517164pt" xmlns:
svgmath=
"http://www.grigoriev.ru/svgmath" viewBox=
"0 -19.433295 311.517164 27.958673"><svg:metadata><svgmath:metrics top=
"27.9586731757" bottom=
"0.0" baseline=
"8.52537803773" axis=
"12.5097530377"/></svg:metadata><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"38.648438" font-family=
"Times New Roman" fill=
"black">ibeta_derivative
</svg:text><svg:g transform=
"translate(79.296879, 0.000000)"><svg:g transform=
"translate(0.000000, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">(
</svg:text></svg:g><svg:g transform=
"translate(3.996094, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.000000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">a
</svg:text><svg:g transform=
"translate(6.000000, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"1.500000" font-family=
"Times New Roman" fill=
"black">,
</svg:text></svg:g><svg:g transform=
"translate(12.999996, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.000000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">b
</svg:text></svg:g><svg:g transform=
"translate(18.999996, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"1.500000" font-family=
"Times New Roman" fill=
"black">,
</svg:text></svg:g><svg:g transform=
"translate(25.999992, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.061523" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">x
</svg:text></svg:g></svg:g><svg:g transform=
"translate(35.720695, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">)
</svg:text></svg:g></svg:g><svg:g transform=
"translate(119.013668, 0.000000)"/><svg:g transform=
"translate(134.347004, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"3.383789" font-family=
"Times New Roman" fill=
"black">=
</svg:text></svg:g><svg:g transform=
"translate(144.447918, 0.000000)"/><svg:g transform=
"translate(157.033856, -3.984375)"><svg:g transform=
"translate(4.114908, -5.765625)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"2.964844" font-family=
"Times New Roman" fill=
"black">∂
</svg:text></svg:g><svg:g transform=
"translate(0.585938, 9.931641)"><svg:g transform=
"translate(0.000000, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"2.964844" font-family=
"Times New Roman" fill=
"black">∂
</svg:text></svg:g><svg:g transform=
"translate(7.263020, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.061523" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">x
</svg:text></svg:g></svg:g><svg:line y2=
"0.000000" stroke-width=
"0.585938" x2=
"14.159504" stroke=
"black" stroke-linecap=
"butt" stroke-dasharray=
"none" y1=
"0.000000" x1=
"0.000000" fill=
"none"/></svg:g><svg:g transform=
"translate(171.779297, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"2.373047" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">I
</svg:text><svg:g transform=
"translate(5.296875, 2.683594)"><svg:text font-size=
"8.520000" text-anchor=
"middle" y=
"0.000000" x=
"2.173682" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">x
</svg:text></svg:g></svg:g><svg:g transform=
"translate(181.140645, 0.000000)"><svg:g transform=
"translate(0.000000, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">(
</svg:text></svg:g><svg:g transform=
"translate(3.996094, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.000000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">a
</svg:text><svg:g transform=
"translate(6.000000, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"1.500000" font-family=
"Times New Roman" fill=
"black">,
</svg:text></svg:g><svg:g transform=
"translate(12.999996, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.000000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">b
</svg:text></svg:g></svg:g><svg:g transform=
"translate(22.996090, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">)
</svg:text></svg:g></svg:g><svg:g transform=
"translate(208.132828, 0.000000)"/><svg:g transform=
"translate(223.466164, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"3.383789" font-family=
"Times New Roman" fill=
"black">=
</svg:text></svg:g><svg:g transform=
"translate(233.567078, 0.000000)"/><svg:g transform=
"translate(246.153016, -3.984375)"><svg:g transform=
"translate(0.585938, -4.165990)"><svg:g transform=
"translate(0.000000, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">(
</svg:text></svg:g><svg:g transform=
"translate(3.996094, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.000000" font-family=
"Times New Roman" fill=
"black">1</svg:text><svg:g transform=
"translate(8.666664, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"3.383789" font-family=
"Times New Roman" fill=
"black">−
</svg:text></svg:g><svg:g transform=
"translate(18.100906, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.061523" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">x
</svg:text></svg:g></svg:g><svg:g transform=
"translate(27.821609, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">)
</svg:text></svg:g><svg:g transform=
"translate(31.817703, -5.367188)"><svg:text font-size=
"8.520000" text-anchor=
"middle" y=
"0.000000" x=
"2.130000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">b
</svg:text><svg:g transform=
"translate(4.260000, -2.828906)"><svg:text font-size=
"8.520000" text-anchor=
"middle" y=
"2.828906" x=
"2.402490" font-family=
"Times New Roman" fill=
"black">−
</svg:text></svg:g><svg:g transform=
"translate(9.064980, 0.000000)"><svg:text font-size=
"8.520000" text-anchor=
"middle" y=
"0.000000" x=
"2.130000" font-family=
"Times New Roman" fill=
"black">1</svg:text></svg:g></svg:g><svg:g transform=
"translate(45.142683, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.061523" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">x
</svg:text><svg:g transform=
"translate(5.724609, -5.367188)"><svg:text font-size=
"8.520000" text-anchor=
"middle" y=
"0.000000" x=
"2.130000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">a
</svg:text><svg:g transform=
"translate(4.260000, -2.828906)"><svg:text font-size=
"8.520000" text-anchor=
"middle" y=
"2.828906" x=
"2.402490" font-family=
"Times New Roman" fill=
"black">−
</svg:text></svg:g><svg:g transform=
"translate(9.064980, 0.000000)"><svg:text font-size=
"8.520000" text-anchor=
"middle" y=
"0.000000" x=
"2.130000" font-family=
"Times New Roman" fill=
"black">1</svg:text></svg:g></svg:g></svg:g></svg:g><svg:g transform=
"translate(15.383248, 9.943372)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.940430" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">B
</svg:text><svg:g transform=
"translate(7.605469, 0.000000)"><svg:g transform=
"translate(0.000000, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">(
</svg:text></svg:g><svg:g transform=
"translate(3.996094, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.000000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">a
</svg:text><svg:g transform=
"translate(6.000000, -3.984375)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"3.984375" x=
"1.500000" font-family=
"Times New Roman" fill=
"black">,
</svg:text></svg:g><svg:g transform=
"translate(12.999996, 0.000000)"><svg:text font-size=
"12.000000" text-anchor=
"middle" y=
"0.000000" x=
"3.000000" font-family=
"Times New Roman" font-style=
"italic" fill=
"black">b
</svg:text></svg:g></svg:g><svg:g transform=
"translate(22.996090, -3.984375)"><svg:text font-size=
"12.012889" transform=
"scale(0.998927, 1)" text-anchor=
"middle" y=
"3.981593" x=
"2.000193" font-family=
"Times New Roman" fill=
"black">)
</svg:text></svg:g></svg:g></svg:g><svg:line y2=
"0.000000" stroke-width=
"0.585938" x2=
"65.364148" stroke=
"black" stroke-linecap=
"butt" stroke-dasharray=
"none" y1=
"0.000000" x1=
"0.000000" fill=
"none"/></svg:g></svg:svg>