a > u > b,
(22)
| ch nΩ = i sh log ( | Q | ) | n | = i √ | b − a′ | √ | a − u | , |
| q | a − a′ | u − b |
(23)
| sh nΩ = i ch log ( | Q | ) | n | = i √ | a − b | √ | u − a′ | , |
| q | a − a′ | u − b |
(24)
| ds | = | ds | dφ | = | m | = | c | Q | ||
| du | dφ | dt | πqu | π | qu |
(25)
| π | AB | = ∫ab | Q | du | ∫ [ | √ (a − b) √ (u − a′) + √ (b − a′) √ (a − u) | ] | 1/n | du | . | ||
| c | q | u | √ (a − a′) √ (u − b′) | u |
(26)