Crossword

Across
2. Centre of the universe
5. S-V×⌊S÷V
9. Set V as a bit vector flagging rows of CI that contain the vector S
12. ⎕__ to vaporize unwelcome objects
14. (AD↓MBT),AD↑MBT for positive AD
15. ⎕__ tells where to break long output lines
16. 1,(A-1)⍴0 for scalar A
18. ,1 ¯1∘.×V for vector V
19. Flag leading 1s in bit vector E
20. OK different random numbers from ⍳B
22. ⎕__ to define a local function
23. MR[;1]-MR[;2] for two-column MR
24. Number of elements in vector V1
26. K×K>0
27. Index of 1st element of vector V that is twice as large as the biggest number in vector NV
30. ×⍳ as in →END×⍳A∊E
32. Number of columns in MAT
33. (F>0)-F<0
34. B formatted to R[2] decimal places within width R[1]
36. Stick V as a new column to the front of matrix 1÷B
37. (5⍴F[1]),(5⍴F[2]),(5⍴F[3]),...
38. )____ to bring in more functions
40. ⎕__ to get a list of vars and/or fns
41. ∨/GI for vector GI
42. Symbols that convert bits to indices
44. (~S∊C)/C
45. Raise to powers

Down
1. ○R*2 for radius R
2. ⎕__, the list of available characters
3. Make a copy of A and name it P
4. (L+DV)≥1 for Boolean L and DV
5. Flag with bits elements of vector BV that begin subvectors that match V
6. (CT*2)*0.5
7. )__ to see what’s not finished
8. ... 0.2 1 5 25 125 625 ...
10. -____ is the alternating sum of the elements of matrix F from end to start
11. X below SM
13. The first X elements of vector K
15. The value of Boolean P with the elements at indices P/⍳⍴P replaced by M
17. One random index, ravelled, from vector V
19. ~0∊KV for bit vector KV
21. ''⍴BV/⍳⍴BV for bit vector BV
23. ⌊-NT
25. All but the first 12 elements of V
26. ((1↑⍴AB),0)⍴AB for matrix AB
28. Is N non-empty?
29. The quotient of M and L, rounded up
31. Format values in O (not zero) to F decimal places
33. G[1]×G[2]×G[3]×...
35. P[BP/⍳⍴BP]
37. Does SA contain a 5?
39. Where O first occurs in vector Y
41. (~1∊I)⍴1
43. Number of rows, columns in matrix N
44. ⎕__ to define “close enough” when deciding whether numbers are equal

Solution to Crossword in 21.2