HP HP-15C

SectionS: Calculating in Complex Mode 87
Keystrokes
|RCL|4
|RCL|5
sm
E
|RCL|6
|RCL|7
sm
s
[GSB][B]
|RCL|4
|RCL|5
sm
s
Display
032-
033-
034-
035-
036-
037-
038-
039-
040-
041-
042-
043-
45 4
45 5
42 25
20
45 6
45 7
42 25
40
32 12
45 4
45 5
42 25
044-
045-
20
43 32
Forms complex b — a.
Calculates (b — a) t.
Forms complex a.
Calculates a + (b — a)t.
Calculates f(a + (b -a)t).
Forms complex
z'(t) = b - a.
Calculates f(z)z'(t).
Labels used: A, 0, and 1.
Registers used: R2, R3, R4, R5, R6, and R7.
To use this program:
1. Enter your function subroutine labeled "B" into program
memory.
2. Press 7 Q][DIM |foil to reserve registers R0 through R7. (Your
subroutine may require additional registers.)
3. Set the display format for (7T|.
4. Enter the two complex points that define the ends of the
straight line that your function will be integrated along. The
lower limit should be in the Y-registers; the upper limit
should be in the X-registers.
5. Press [f] [A] to calculate the complex line integral. The value
of the integral is in the X-registers; the value of the
uncertainty is in the Y-registers.
Because two integrals are being evaluated, the program will
usually take longer than a real integral, although the |7T| routine
doesn't have to use the same number of sample points for both
integrals. The easier integral will use less calculations than the
more difficult one.