Recent content by selig5560

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    I Rewriting a piecewise function using step functions

    Suppose we have a piecewise function f(t) = exp(c*t) when 0 <= t < 2 and f(t) = 0 when t >= 2. Can the above be rewritten as f(t)= exp(at)*[H(t-0) - H(t-2)], H is a heaviside function.
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    Topological Conjugation between two dynamical systems

    THanks for the reply I will try it out. EDIT: It works now. However, out of self-interest I would like to understand a bit more abour your statement. Isnt |h(x)| = -h(x) when x < 0? In this case x <= 1/2, so how would it be true that |h(x)| = -h(x) (when the condition is when its x < 0? Selig
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    Topological Conjugation between two dynamical systems

    I used the affine transform you provdd ie. 2x-1 and it did not yield a conjugation. my work: g(h(x)) = 1-2|2x-1| h(T(x)) = x <= 1/2: 2(2x) - 1 = 4x - 1 \neq -4x+3 = 1-2(2x-1) = g(h(x)) x >= 1/2: 2(2-2x) - 1 = 4 - 4x - 1 = -4x + 3 = 1-2(2x-1) = 1-4x + 3 = -4x + 3 = g(h(x)) this is of...
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    Topological Conjugation between two dynamical systems

    Thanks for the reply. Good point on the cosine being even - Forgot about that. I tried your "straightforward" approach, however no luok so far. If I'm not mistaken the homeomoprhism has to be algebraic at this point. I don't see a way of simplifying trig functions with those | | being part of...
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    Topological Conjugation between two dynamical systems

    Find a topological conjugation between g(x) and T(x) where g and T are mappings (both tent maps [graphically speaking]) g:[-1, 1] → [-1,1] g(x) = 1-2|x| T:[0,1] → [0, 1] T(x) = 2x when x ≤ 1/2 and 2(1-x) when x ≥ 1/2 h ° T = g ° h (homeomorphism) h:[0, 1] → [-1, 1] h(x) = cos(∏x)...
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    Topological Conjugation between two dynamical systems

    Homework Statement Find a topological conjugation between g(x) and T(x) where g and T are mappings (both tent maps [graphically speaking]) Homework Equationsg:[-1, 1] → [-1,1] g(x) = 1-2|x| T:[0,1] → [0, 1] T(x) = 2x when x ≤ 1/2 and 2(1-x) when x ≥ 1/2 h ° T = g ° h (homeomorphism)The...
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    Schools Stanford EPGY University Level Math courses?

    Thank you very much for the answers! I decided to take the RA course to prepare for Rudin since my Linear Algebra wasnt proof based. When you got your transcript from Stanford did it mention EPGY on the transcript?
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    Schools Stanford EPGY University Level Math courses?

    They did allow me to take classes there.
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    Schools Stanford EPGY University Level Math courses?

    I'm interested in taking PDEs, Elemntary Real Anaylsis, and Complex Analysis. I would think these would transfer to my school by looking at the similar course syilibi and exact textbook uses (PDEs and Complex Analysis specifcially)
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    Schools Stanford EPGY University Level Math courses?

    Hi - I am interested if taking the Stanford EPGY uni-level math courses would be a good choice. It seems like they teach university level math courses and you receive stanford college credit for it. Does anyone know much more about their program? I've been accepted to be able to take classes...
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    Am I ready for Real Analysis I?

    Thank you for the help! So my options this semester are either Vector Analysis (NOT calc 3, but actual vector analysis) and PDEs or Analysis I and Intro to proofs. As a math major (applied) would track should i take this sem?
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    Am I ready for Real Analysis I?

    Hi - THanks for the advice! However, the books used at my university are either Pugh or Rudin...What is baby rudin?
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    Am I ready for Real Analysis I?

    Quick update, I found out that I can take "Intro to proofs" and Real Analysis without overriding any prereqs (a way of taking analysis is to take it concurrently with intro to proofs.) Any thoughts?
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    Am I ready for Real Analysis I?

    Hi - I have already looked through Rudin and some other books on analysis. My worry is that I don't seem to easily get how to prove the proofs in Real Analysis. Is that something to be worried about? In terms of proofs, I've done induction, contrapositive, and proof my contradiction (This was...
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    Am I ready for Real Analysis I?

    Hi - I am a second semester Sophomore, and am wondering what I need to know to succeed in Real Analysis. My background is in linear algebra, differential equations, and calculus. However, I have not had any real exposure to rigorous proofs which I hear what you do in RA. The prerequisite for...
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