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January 6, 2011

Linked-list, stage 1

srikanth @ 11:59 pm, GMT +0000 ( 1294358372 ) Play

A slight twist. Three questions, back-to-back, all related. All you need to do is tell us what the variables A through K stand for.

Anyone who gets the whole set gets a bonus point. All questions remain open for 3 more days!

This post has 3 variables (A, B, C). Get all 3 right to get 1 point :-)

Eastern-european logician A invented B around 1920 in order to simplify sentences used in propositional calculus. B remained in use largely in logic and didn’t see much interest in mainstream arithmetic. Despite this, a “reversed” version of B became popular with some electronic devices, notably those from company C! The devices from C, especially, have become iconic and gained a cult following. (Though many people consider them to be merely a curiosity, C’s devices have some very advanced arithmetic in them and a Turing Award winning UCBerkeley maths/CS prof was involved in their design!).

Cracked by Goyal , Rogi(2) , dineshk(2) , Kaustubh(2) , buk , Anjul , apar , jowens(2) , p vs np(2) , puneet_k(2) , Sumanth Patlolla(2) , shrik(2) , Dibyo(2) , vinayaknp(2) , Siddarth Pai , Bharath(2) , Aravind , Pawankumar Hegde(2) , madhur(2) , Qbrain(2) and lanu(2)

And these people got the bonus point!

Rogi, dineshk, Kaustubh, jowens, p vs np, puneet_k, Sumanth Patlolla, shrik, Dibyo, vinayaknp, Bharath, Pawankumar Hegde, madhur, Qbrain, lanu,

Answer:

A-Jan Łukasiewicz
B-Polish Notation
C-Hewlett-Packard


22 Responses to “Linked-list, stage 1”

  1. Goyal
    3
    2
    1

    Jan Łukasiewicz, Polish Notation, HP


  2. Rogi
    48
    10
    5

    A-Jan Łukasiewicz
    B-Polish Notation
    C-Hewlett-Packard


  3. dineshk
    4
    3
    2

    A = Jan Lukasiewicz
    B = Polish notation aka Prefix notation
    C = Hewlett Packard.

    The HP scientific calculators used polish notation and William Kahan, the Berkeley CS prof. helped in the design of the HP-10C series.


  4. Kaustubh

    A – Jan Lukasiwicz
    B – Polish Notation
    C – HP


  5. buk
    2

    A – Jan Lukasiewicz
    B – Polish Notation
    C – HP (Hewlett-Packard)


  6. Anjul
    2
    1
    1

    A is Jan Łukasiewicz the Polish logician
    B is ‘Polish Notation’ (RPN or Reverse Polish Notation is more commonly known)
    C is Hewlett Packard whose calculators used RPN


  7. apar
    2

    A = Jan Łukasiewicz
    B = Polish Notation
    C = HP


  8. jowens
    13
    2

    A – Jan Łukasiewicz
    B – Polish notation
    C – Hewlett Packard
    D – Hungarian notation
    E – Charles Simonyi
    F – Microsoft
    G – iPad (wrt Tablet PC)
    H – Robert Metcalfe
    I – Xerox Parc
    J – Apple
    K – Macintosh (though I would argue the Apple II would be a more appropriate “first commercial success”)


  9. Awesome set of questions! Here goes –

    A : Jan Łukasiewicz
    B : Polish notation
    C : Hewlett Packard


  10. puneet_k

    A -> Jan Lukasiewicz / Jan Łukasiewicz (Poland)
    B -> Polish notation
    C -> Hewlett-Packard


  11. Sumanth Patlolla
    27
    8
    7

    A- Jan Łukasiewicz
    B- Polish notation or Prefix notation
    C- HP-10C series calculators


  12. shrik
    10
    7
    9

    A – Jan Lukasiewicz
    B – Polish notation
    C – HP


  13. Ananth
    4
    5
    9

    A: Jan Łukasiewicz
    B: Polish Notation
    C: Apple


  14. Dibyo
    11
    14
    10

    A: Jan Lukasiewicz
    B: Postfix, or Polish Notation
    c: Hewlett Packard


  15. vinayaknp

    A: Jan Lukasiewicz
    B: Polish Notation
    C: Hewlett Packard


  16. Siddarth Pai

    A- Jan Lukasiewicz
    B- Polish Notation
    C- Hewlet Packard, in their science calculators.


  17. Bharath
    4
    2
    4

    A-Jan Łukasiewicz
    B- Polish/ Prefix notation
    C- Hewlett Packard


  18. Aravind

    Jan Lukasiewicz invented the Polish notation. The reverse polish notation was used extensively in calculators produced by Hewlett-Packard. These calculators were designed with help from the UC Berkeley prof William Kahan


  19. Pawankumar Hegde
    2

    A- Jan Lukasiewicz
    B- Polish Notation
    C- Hewlett packard


  20. madhur
    1

    A: Jan Łukasiewicz
    B: Polish Notation
    C: HP


  21. Qbrain
    1

    A – Jan Łukasiewicz polish born logician , invented

    B – “Polish Notation” for the logical connectives

    Reverse version of B – “Reverser Polish Notation” has been used by

    C – Hewlett-Packard – On their calculators.[ i.e., HP-10C calculators]

    The UC – Berkely scientist who contributed substantially to the design of the algorithms in the HP-10C series – William Morton Kahan, winner of Turing Award in 1989


  22. lanu
    1

    A- Jan ukasiewicz
    B – Polish notation
    C- HP


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