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| <h3 class="section">8.30 <code>BESSEL_Y1</code> — Bessel function of the second kind of order 1</h3> |
| |
| <p><a name="index-BESSEL_005fY1-466"></a><a name="index-BESY1-467"></a><a name="index-DBESY1-468"></a><a name="index-Bessel-function_002c-second-kind-469"></a> |
| <dl> |
| <dt><em>Description</em>:<dd><code>BESSEL_Y1(X)</code> computes the Bessel function of the second kind of |
| order 1 of <var>X</var>. This function is available under the name |
| <code>BESY1</code> as a GNU extension. |
| |
| <br><dt><em>Standard</em>:<dd>Fortran 2008 and later |
| |
| <br><dt><em>Class</em>:<dd>Elemental function |
| |
| <br><dt><em>Syntax</em>:<dd><code>RESULT = BESSEL_Y1(X)</code> |
| |
| <br><dt><em>Arguments</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>X</var> </td><td valign="top" width="70%">The type shall be <code>REAL</code>, and it shall be scalar. |
| <br></td></tr></table> |
| |
| <br><dt><em>Return value</em>:<dd>The return value is a scalar of type <code>REAL</code>. It has the same |
| kind as <var>X</var>. |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> program test_besy1 |
| real(8) :: x = 1.0_8 |
| x = bessel_y1(x) |
| end program test_besy1 |
| </pre> |
| <br><dt><em>Specific names</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="20%">Name </td><td valign="top" width="20%">Argument </td><td valign="top" width="20%">Return type </td><td valign="top" width="25%">Standard |
| <br></td></tr><tr align="left"><td valign="top" width="20%"><code>DBESY1(X)</code></td><td valign="top" width="20%"><code>REAL(8) X</code> </td><td valign="top" width="20%"><code>REAL(8)</code> </td><td valign="top" width="25%">GNU extension |
| <br></td></tr></table> |
| </dl> |
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