21 A 三 ⻔
a El 不 加 eigenvalues ofA
AT个 ⻔
A 阿⼆⼆
2 ⼊
2
1 o
4 2⼊⼗万
2
1
⽔ 2 3
D 3 H1 o 3or⼑ 1
b Cl Find orthogonalmatrix P P都汇了别
⼊ 3
Anji ⻔ 汇⻔问
上⼆们
⼆ ⼑ y
⼆ ⽓
Anti D ⽅ 到
⼆ 0
3Y K o
x Íxz
Rly
让 部
c Find all c at A is positive define Cl y ty.ci
Where meanEy 2 1 Find 区
0哿
redefine yTty70
a
PEN 別
⼆下对⼗以 以忆州别
ey.ly tcyzstyzl.ly 292
2yitcy.yztc.gg125
2yitatyyzt2yi
y 4fty 42cy.pt yE
Go I 1
0r 5.4a
不确定C有没有做对
44 44 0
40 16
d 4
AI ⻔ His symmetricc ⼟2
区10擧 区12件 2A区⽜ 21 ⻔
2
度㓤 21纩问
d ciz Find conditional inverse A
A.AE⻔ HAH 肚信 ⻔
感觉这⾥应该是 idempotent
Q Li Let A B be symmetric independent matrix with
Rank r and n respectively Let y g yinMUN红
a let p be an orthogonal matrix Find distribution Pg
呵 MUN lo In FIR PP I
b HAB.BA find distribution of ygtj By_
如果上⾯A13是 idempotent
iAB.BA ⼆0 A and B are independent
AV13 13⽐ 0
jg xi.si By 哈
yytjBy XF.tn
c 笁㗊 i 㗊 㗊了
叫
ABhupenA2 0
简 c cishupot
d E uwyij.li J DIE ⻔
EIÉDZ tr DV fi Dt
D 丝 j i
4
⻔
⼗吅 以 4 1 5
I 1 3 I ⻔ 引
⼆ E4 16 2 3 ⻔
2 1 i
2 13 1
EIÉDZ 5 1 6
e jDy and Ey are independent
E V1 0
吕 红 只 4⻔
⼆ ⽅ I ⻔ 18
2b 4 b
45 2C 2btc I
信息 8 15
4
4 b o
s c
的 ⼈ 4
e 8