Latest Steve Jobs Mystery Revealed: How He Drove Without License Plates (from yahoo.com)

The multitude of mysteries revealed following the death of Apple co-founder Steve Jobs' death now includes one that puzzled car enthusiasts for years: How did Jobs get away with driving without a license plate? It was common knowledge that Jobs would park his Mercedes SL55 AMG in a handicapped spot at Apple's Cupertino, Calif., headquarters, with nothing to identify his vehicle other than the tiny barcode that usually rests behind the rear license plate. According to Walter Isaacson's new biography, Jobs wanted to avoid having a plate for privacy reasons; and yet when having a license-less silver Mercedes became a kind of trademark, Jobs kept motoring without one"because I don't."

For years, rumors swirled that Jobs had either won a special dispensation from California authorities or was just daring police to stop him. While the why remains somewhat cloudy, an interview by ITWire with a former Apple security executive reveals the real reason: a little-known loophole in California vehicle laws that gives owners up to six months to get plates for their vehicles.

According to Jon Callas, now chief technical officer of Entrust, Jobs would arrange with his vehicle leasing company to switch out his silver Mercedes every six months with a new, identical model — just another of the complicated and expensive ways Jobs thought differently.


ref (http://autos.yahoo.com/news/latest-steve-jobs-mystery-revealed--how-he-drove-without-license-plates.html)

15.2 Matrix-chain multiplication (Matrix multiplication)

Details and full solution for example 15.2 page (376) in the book (Introduction to Algorithms, Third Edition. by Thomas H. Cormen , Charles E. Leiserson , Ronald L. Rivest , Clifford Stein )

To Find an optimal parenthesization of a matrix-chain product whose sequence of dimensions is <30, 35, 15, 5, 10, 20, 25>.

Done by: Bakr AlMushaileh

 

Sequence	P0	P1	P2	P3	P4	P5	P6
Dimension	30	35	15	5	10	20	25

Matrix	A1	A2	A3	A4	A5	A6
Dimension	30 X 35	35 X 15	15 X 5	5 X 10	10 X 20	20 X 25

1	m(1,2)=m(1,1)+m(2,2)+P0P1P2		= 0 + 0 + (30 . 35 . 15) = 15750	K = 1
	m(2,3)=m(2,2)+m(3,3)+P1P2P3		= 0 + 0 + (35 . 15 . 5) = 2625	K = 2
	m(3,4)=m(3,3)+m(4,4)+P2P3P4		= 0 + 0 + (15 . 5 . 10)= 750	K = 3
	m(4,5)=m(4,4)+m(5,5)+P3P4P5		= 0 + 0 + (5 . 10 . 20)= 1000	K = 4
	m(5,6)=m(5,5)+m(6,6)+P4P5P6		= 0 + 0 + (10 . 20 . 25)= 5000	K = 5
2	m(1,3)=min	m(1,1)+m(2,3)+P0P1P3	=0+2625+ (30 . 35 . 5)= 7875	min = 7875 K=1
		m(1,2)+m(3,3)+P0P2P3	=15750+0+ (30 . 15 . 5)= 18000
	m(2,4)=min	m(2,2)+m(3,4)+P1P2P4	= 0 + 750 + (35 . 15 . 10)= 6000	min = 4375 K=3
		m(2,3)+m(4,4)+P1P3P4	= 2625 + 0 + (35 . 5 . 10)= 4375
	m(3,5)=min	m(3,3)+m(4,5)+P2P3P5	= 0 + 1000 + (15 . 5 . 20)= 2500	min = 2500 K=3
		m(3,4)+m(5,5)+P2P4P5	= 750 + 0 + (15 . 10 . 20)= 3750
	m(4,6)=min	m(4,4)+m(5,6)+P3P4P6	= 0 + 5000 + (5 . 10 . 25)= 6250	min = 3500 K=5
		m(4,5)+m(6,6)+P3P5P6	= 1000 + 0 + (5 . 20 . 25)= 3500
3	m(1,4)= min	m(1,1)+m(2,4)+P0P1P4	=0+4375+(30 . 35 . 10 )=14875	min = 9375 K=3
		m(1,2)+m(3,4)+P0P2P4	=15750+750+(30.15.10 )=21000
		m(1,3)+m(4,4)+P0P3P4	=7875+0+ (30 . 5 . 10)=9375
	m(2,5)= min	m(2,2)+m(3,5)+P1P2P5	=0+2500+(35 . 15 . 20 )=13000	min = 7125 K=3
		m(2,3)+m(4,5)+P1P3P5	=2625+1000+(35 . 5 . 20 )=5125
		m(2,4)+m(5,5)+P1P4P5	=4375+0+ (35 . 10 . 20)=11375
	m(3,6)= min	m(3,3)+m(4,6)+P2P3P6	=0+3500+(15 . 5 . 25)=5375	min = 5375 K=3
		m(3,4)+m(5,6)+P2P4P6	=750+5000+(15 .10. 25)=9500
		m(3,5)+m(6,6)+P2P5P6	=2500+0+ (15 . 20 . 25)= 10000
4	m(1,5)= min	m(1,1)+m(2,5)+P0P1P5	=0+7125+(30.35.20)=25125	min =11875 K=3
		m(1,2)+m(3,5)+P0P2P5	=15750+2500+(30.15.20)=27250
		m(1,3)+m(4,5)+P0P3P5	=7875+1000+(30.5.20)=11875
		m(1,4)+m(5,5)+P0P4P5	=9375+0+(30.10.20 )=15375
	m(2,6)= min	m(2,2)+m(3,6)+P1P2P6	=0+9375+(35.15.25 )=22500	min =10500 K=3
		m(2,3)+m(4,6)+P1P3P6	=2625+3500+(35.5.25)=10500
		m(2,4)+m(5,6)+P1P4P6	=4375+5000+(35.10.25)=18125
		m(2,5)+m(6,6)+P1P5P6	=7125+0+(35.20.25)=24625
5	m(1,6)= min	m(1,1)+m(2,6)+P0P1P6	=0+10500+(30.35.25)=36750	min =15125 K=3
		m(1,2)+m(3,6)+P0P2P6	=15750+9375+(30.15.25 )=36375
		m(1,3)+m(4,6)+P0P3P6	=7875+3500+(30.5.25 )=15125
		m(1,4)+m(5,6)+P0P4P6	=9375+5000+(30.10.25 )=21875
		m(1,5)+m(6,6)+P0P5P6	=11875+0+(30.20.25 )=26875

((A₁ (A₂ A₃))((A₄ A₅) A₆))

"Steve Jobs" by Walter Isaacson

I got my copy of the book
It's really amazing book
And almost cover every things about Steve jobs social live and in work
Finally it's good 2 know Steve by this amazing book