Recent content by mad mathematician

  1. mad mathematician

    I Formal derivation of statement from Peano Arithmetic system

    When you say that you use a Hilbert system without natural deduction, do you mean that you can't use rules that are specific to the quantifiers? such as universal elimination etc. A rigorous and exact solution will be to eliminate a quantifier and after that introduce a quantifier. BTW, I am...
  2. mad mathematician

    I Formal derivation of statement from Peano Arithmetic system

    In my derivation I forgot to mention that I use y+0=y; acknowledged we proved already x+(y+z)=(x+y)+z plug z=0, and get: x+(y+0)=(x+y)+0; now from the axiom A3 we have: y+0=y and (x+y)+0=(x+y), and you proved that also ##\varphi(0)## follows from A3.
  3. mad mathematician

    I Formal derivation of statement from Peano Arithmetic system

    You want to use A4 to prove associativity of addition, so we have for z=1: (x+y)+1=x+(y+1) this is an instantiation of axiom A4. Now we use induction: suppose for z=n we have (x+y)+n=x+(y+n), now for z=n+1 we get: ((x+y)+(n+1))=((x+y)+n)+1=(x+(y+n))+1=x+((y+n)+1)=x+(y+(n+1)). In the first...
  4. mad mathematician

    I Formal derivation of statement from Peano Arithmetic system

    You need to use induction on z and to invoke an instance of A4.
  5. mad mathematician

    A The "electroweak eta meson"

    You mean as vectors the states are independent of eachother (i.e one is not a linear combination of the other). Theoretically every particle should have an anti particle (unless they have no electric charge like the photon). You said this paper was launched last year, it does take time to make...
  6. mad mathematician

    A The "electroweak eta meson"

    I wonder a state which is in a superposition that should annihilate itself before the wave function collapses... Maybe this can also answer the seemingly interesting problem of why there's more matter than anti matter in the universe...
  7. mad mathematician

    Quantum "WHAT IS A QUANTUM FIELD THEORY?" A First Introduction for Mathematicians

    Well, I've got two books that treat QFT for the math-geared ahead (I double majored in maths and physics), they kind of old. There's Ticcati's red book and Folland's. Didnt finish reading them though... :oldbiggrin:
  8. mad mathematician

    I A very interesting paper on orthodox quantum mechanics

    Well being orthodox in Q theory interpretations means usually to adhere to Copenhagen interpretation, as far as I can tell.
  9. mad mathematician

    Applied Blennow to follow up Altland?

    I'd recommend Arfken (I used it a bit for a third mathematical methods for physicists course, you can't have enough maths... that's why I am so MAD.... :oldbiggrin: ) I wonder which edition are they nowadays?... P.S I used it for the part that was needed for the course.
  10. mad mathematician

    Solid State Ashcroft and Mermin: revised edition

    being a ~40 year old student is really harsh with those prices of books just keep escalating.
  11. mad mathematician

    I Physicists disagree wildly on what quantum mechanics says about real…

    Computer says:No, none exists. at least not consistent. Either that, or it never halts.... :oldbiggrin:
  12. mad mathematician

    Music Nice track

    Baby, give it up.... off to SUSY...
  13. mad mathematician

    Music Nice track

    enjoy, just as I have.
  14. mad mathematician

    History An old 1990's lecture by Hawking

    you can try playing it with winamp, unfortunately as I said it sounds discontinuous.
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