# In Memory of Nelson Rolihlahla Mandela

```In Memory of
Nelson Rolihlahla Mandela
5 December 2013
Aziz S. Inan
Donald P. Shiley School of Engineering
University of Portland
5 December 2013
1
South African anti-apartheid revolutionary
and President Nelson Rolihlahla Mandela was
born on 18 July 1918 (18-07-1918). We lost
this great man today, on 5 December 2013
(5-12-2013), at age 95.
5 December 2013
2
I dedicate these next few slides in his
memory.
5 December 2013
3
Mandela died on the HighestPower Day of the Year
Mandela’s death date, 5 December,
expressed as 5-12, or simply as 512, is the
highest-power date in each year. How?
512 =
9
2!
(Note that 5 December (512) is the highest-power date of
each year in the day-month-year date format. However, in
the month-day-year date format, the highest-power date is
October 24, expressed as 1024 = 210!)
5 December 2013
4
Mandela died on a Pythagorean Day
Mandela died on a Pythagorean Day.
Why? If 5 December 2013 is expressed as
5-12-13, then:
52 + 122 = 132!
Other such ascending-order Pythagorean Days in
each century in day-month-year date format are 0304-05, 06-08-10, and 09-12-15. (Additional
Pythagorean Days in the month-day-year date format
are 8-15-17, 12-16-20, 7-24-25, and 10-24-26.)
5 December 2013
5
Number 512 Repeats in Mandela’s Name
Three Times
If numbers are assigned to the letters of
Mandela’s full name based on the English
alphabet (let A = 1, B = 2, etc.), number 512
(representing Mandela’s death day) repeats in
his full name three times:
NELSON  14512191514
14
5
12 19
15
14
ROLIHLAHLA  181512981218121
18
15
12 9
8
12
1
8
12
1
MANDELA  1311445121
13
1
14
4
5
12
1
5 December 2013
6
Number 121 Repeats in Mandela’s Name
Four Times
Number 121 repeats four times in
Mandela’s full name:
NELSON  14512191514
ROLIHLAHLA  181512981218121
MANDELA  1311445121
5 December 2013
7
Four 121’s “Magically” Lead to Mandela’s
Death Date
How?
121 = 11 x 11 = 112
121 + 121 + 121 + 121 = 484 = 22 x 22
22 + 22 = 44
112 x 44 = 112 x 43 + 112
112 x 43 = 5203
112 = 121
5122013!
5 December 2013
8
Numerical Connection Between Mandela’s
Name and Death Date
Mandela’s death date, 5 December 2013, can be
written as:
5-12-13
Notice that numbers 523 and 11 are intertwined
to result in 51213. Interestingly enough, reverse
of one less than 523 is 225, which equals the sum
of the numbers assigned to the letters of Nelson
Rolihlahla Mandela [1]. Also, interestingly, 523 –
11 = 512 (again, 5 December).
5 December 2013
9
You will be missed, Nelson Mandela!
References:
[1] A. S. Inan, “Happy 95th Birthday, Nelson Rolihlahla Mandela,” July 17, 2013.
http://faculty.up.edu/ainan/publications.html
5 December 2013
10
```
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