> #Attendence Q1. > #Write down the set all the integers partition of 7. > #1+3+4+3+2+1+1 = 15 > #With 1 part: {[7]} > #With 2 part: {[1,6], [2,5], [3,4]} > #With 3 part: {[1,1,5], [1,2,4],[1,3,3],[2,2,3]} > #With 4 part: {[1,1,1,4], [1,1,2,3], [1,2,2,2]} > #With 5 part: {[1,1,1,1,3], [1,1,1,2,2]} > #With 6 part: {[1,1,1,1,1,2]} > #With 7 part: {[1,1,1,1,1,1,1]} > > #Attendence Q2. > #Write down the set of partitions of 7 into distinct parts, and write the explicit the number of integer partitions of 7 into odd parts including 7. Find out whether it's same number. > #With 1 part: {[7]} > #With 2 part: {[1,6], [2,5], [3,4]} > #With 3 part: {[1,2,4]} > #With 4 part: {} > #With 5 part: {} > #With 6 part: {} > #With 7 part: {} > > #With 1 part: {[7]} > #With 2 part: {} > #With 3 part: {[1,1,5],[1,3,3]} > #With 4 part: {} > #With 5 part: {[1,1,1,1,3]} > #With 6 part: {} > #With 7 part: {[1,1,1,1,1,1,1]} > #Both have 5 partitions. Same. > > #Attendence Q3. > read `M24.txt`; `For a list of the SET procedures, type: Help24s();` `For a list of the ENUMERATION procedures (via Dynamic programming), type: Help24e();` `For a list of the GENERATING functions procedures type: Help24g();` > seq(nops(Pn(i)), i=1..20); 1, 2, 3, 5, 7, 11, 15, 22, 30, 42, 56, 77, 101, 135, 176, 231, 297, 385, 490, 627 > #What is the A-number of this sequence? > #A000041: a(n) is the number of partitions of n > > #Attendence Q4. > #Who wrote the classic book on the theory of partitions? What is his birthday? > #George E. Andrews > #1938/12/4 > > #Attendence Q5. > #What is the a number of this sequence? > seq(nops(PnD(i,1)),i=1..10); 1, 1, 2, 2, 3, 4, 5, 6, 8, 10 > #A000009: Expansion of Product_{m >= 1} (1 + x^m); number of partitions of n into distinct parts; number of partitions of n into odd parts. > > #Attendence Q6. > seq(nops(PnD(i,2)),i=1..20); 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 9, 10, 12, 14, 17, 19, 23, 26, 31 > #A3114:Number of partitions of n into parts 5k+1 or 5k+4. > > #Attendence Q7. > #Whoses theorem is it that these above two sequences are the same? > # G. E. Andrews, The Theory of Partitions, Addison-Wesley, 1976, p. 109, 238. > > #Attendence Q8. > #What is the a number of this sequence? > seq(pn(5*n+4)/5, n=1..20); 6, 27, 98, 315, 913, 2462, 6237, 15035, 34705, 77231, 166364, 348326, 710869, 1417900, 2769730, 5308732, 9999185, 18533944, 33845975, 60960273 > #A071734: a(n) = p(5n+4)/5 where p(k) denotes the k-th partition number. > > #Attendence Q9. > #Does there exist a k between 0 and 6 such that > seq(pn(7*n+5)/7, n=1..20); 11, 70, 348, 1449, 5334, 17822, 55165, 160215, 441105, 1159752, 2929465, 7142275, 16873472, 38749850, 86737678, 189672868, 405991500, 852077072, 1756048833, 3558408287 > #A071746: a(n) = p(7n+5)/7 where p(k) denotes the k-th partition number. > > Does there exist a k between 0 and 10 such that > seq(pn(11*n+6)/11, n=1..20); 27, 338, 2835, 18566, 101955, 490253, 2121679, 8424520, 31120519, 108082568, 355805845, 1117485621, 3366123200, 9767105406, 27398618368, 74534264393, 197147918679, 508189847045, 1279140518117, 3149375120229 > #A076394: a(n) = p(11n+6)/11 where p(n) = number of partitions of n (A000041). > > #Attendence Q10. > #Why should Dr.Z from now on make you watch the lectures before the recitation? > #So that, we can ask questions for the lecture during the recitation. > > >