x

${\varphi }_{Exact}$

${\varphi }_{R.K.}$

$E_{R.K.}$

${\varphi }_{B.B.}$

$E_{B.B.}$

0

0

0

0

0

0

0.1

0.0001000

0.0001499

4.9997 × 10⁻⁵

0.0000999

2.4167 × 10⁻¹⁰

0.2

0.0004000

0.0004999

9.9978 × 10⁻⁵

0.0003999

3.853 × 10⁻⁹

0.3

0.0009000

0.0010499

1.4992 × 10⁻⁴

0.0008999

1.9247 × 10⁻⁸