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Multifractal Analysis of F exponents for Conformal Graph Directed Markov Systems
An in person chalkboard version of this talk was presented at Dynamical Systems and Fractal Geometry Conference that was hosted at the University of North Texas May 14-17th, 2024. This talk was given on the 16th.
We organized this conference in part to honor the lifetime achievement of my PhD Advisor Dr. Mariusz Urbański who was awarded the Sierpiński medal for his contribution to his areas of research in mathematics. His laureate Wacław Sierpiński lecture was titled: Operatory Ruella i miary konforemne z zastosowaniami w teorii liczb i geometrii fraktalnej (Ruelle operators and conformal measures with applications to number theory and fractal geometry). As I mention in the video, it has been my great joy to pursue my dissertation research under the mentorship of Dr. Urbański and I would not be the mathematician I am today without him.
Abstract: We will take a moment to recall a result from Fan et al. (2009) regarding a characterization of the Khintchine spectrum of the Gauss map. Proceeding by analogy, we then define multifractal decompositions with respect to F-exponents and state a general result that applies to a wider class of systems and spectra. Our brief dive into multifractal analysis ends with a look at an example of the Lyapunov spectrum for a particular Lüroth
expansion.
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This talk is related to my recent preprint on multifractal analysis of finitely irreducible conformal graph directed Markov systems, this work is a portion of my upcoming dissertation that I am completing under the direction of my PhD advisor Dr. Mariusz Urbański.
You can find my preprint on ResearchGate here: www.researchgate.net/publication/379840671_Multifractal_Analysis_of_F-exponents_for_Finitely_Irreducible_Conformal_Graph_Directed_Markov_Systems
It is also available on the arXiv here: arxiv.org/abs/2404.09348
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I have given another talk concerning this paper on a different subject and documented it here: ua-cam.com/video/I3ZsnjwnL8w/v-deo.html
Переглядів: 307

Відео

Extremal F-Exponents of Finitely Irreducible CGDMSs: a math dissertation research talk.
Переглядів 4154 місяці тому
An in person chalkboard version of this talk was presented at the University of North Texas's Dynamical Systems Seminar in person on April 19th, 2024. Abstract: Given a Hölder family of functions 𝐹 and a finitely irreducible CGDMS Φ encoded by a symbolic representation 𝐸∞𝐴, one may associate to each coding 𝜔∈𝐸∞𝐴 a Birkhoff average 𝜉(𝜔) called the 𝐹-exponent of 𝜔, should it exist. The ergodic op...
What is Multifractal Analysis? Modern Fractal Geometry and my research
Переглядів 1,4 тис.4 місяці тому
Hausdorff dimension is not a fine enough analysis for many objects of interest in modern fractal geometry. Luckily Hausdorff dimension can be adapted to the study of multifractals or a multifractal decomposition via multifractal analysis. This area of modern fractal geometry is core to my math phd research area for my dissertation, and so I wanted to spend a bit of time trying to communicate a ...
Analyzing the distribution of digits: where number theory, fractal geometry, and probability meet.
Переглядів 8255 місяців тому
Fractal Geometry and Hausdorff dimension at first glance appear esoteric and wholly unrelated to other fields of mathematics. However, Hausdorff dimension turns out to be a very powerful tool in distinguishin sets from one another when other more intuitive methods like that of topological properties and measure fail. One such example from Number Theory is that of the distribution of digits in m...
Methods for Estimating Hausdorff Dimension: Bounds and The Mass Distribution Principle
Переглядів 5535 місяців тому
Calculations of Hausdorff dimension can be quite difficult via direct computation, so instead most of the time estimating Hausdorff dimension is good enough! We'll look at the definition of Hausdorff dimension again to see why it is hard to calculate directly, go through a method for estimating Hausdorff Dimension that gives upperbounds through some combinatorial geometry regarding finite cover...
What is Hausdorff Dimension? Intuition, Gauge Functions, and Hausdorff Measures
Переглядів 2 тис.6 місяців тому
A stab at one of the introductory questions in fractal geometry "What is Hausdorff Dimension?", this video starts intuitively with an analysts notion of dimension form the perspective of scaling before introducing gauge functions, Hausdorff outer measures and Hausdorff measures. With these measures defined we look at an important family of gauge functions to define the Hausdorff dimension, that...
What is a measure preserving dynamical system?
Переглядів 7666 місяців тому
Dynamics and Measure Theory are very closely intertwined fields of modern mathematics and they are connected by the study of measure preserving dynamical systems, or those dynamical systems that preserve a measure under backwards iteration. Measure preservation is a very important concept that can be talked about with even introductory examples like with the doubling map and I give a bit of arg...
What is a topological dynamical system? The doubling map and other basics.
Переглядів 2,8 тис.7 місяців тому
What is a topological dynamical system? Here we go over the basics of discrete dynamics of metrizable spaces, and we will give a handful of examples including the doubling map. Other examples come from two families of well studied cases, those of circle maps and directed graphs. After giving the definition of a topological dynamical system we go through some basic computations for these systems...
What is a Probability?
Переглядів 1 тис.7 місяців тому
It's very common to lean on the idea that a probability is just "chance", but in mathematics, probability is a much more general and wildly used tool. So, what is a probability measure? And, what are some examples (some based in chance and some not). "Everything is 50 50" can even make sense in the more general setting of what a probability is actually defined to be. 00:00 Intro 00:28 What is a...
My math research and YouTube year in review 2023 (math phd update New Years Day 2024)
Переглядів 1,4 тис.8 місяців тому
Decided to wrap up the year by reflecting on my math research and year on UA-cam in 2023. In this video I give a math research reflection along with a dissertation update and even go into how much UA-cam paid me from my mathematics videos in 2023. It has been a really good year and I finally feel like I am getting somewhere with my research and dissertation! With such a good end to the year I'm...
How they played chess forever, snowflakes, and other ubiquitous joys of avoiding an awawa in binary
Переглядів 61110 місяців тому
How they played chess forever, snowflakes, and other ubiquitous joys of avoiding an awawa in binary: The Prouhet-Thue-Morse Sequence and its properties (a math video essay) 00:00:00 Intro 00:00:24 CH1 Let's play chess (forever) Part 1 00:02:55 CH2 Counting in the Fjords 00:05:15 CH3 "0", "1" and "01" 00:08:50 CH4 Thue's Answer and The Prouhet-Thue-Morse Sequence 00:12:57 CH5 (Part1) An awawa an...
Removed Head from Book | Math PHD Update (September 2023)
Переглядів 2,6 тис.Рік тому
Removed head from book for another math phd update to start off the fall term 2023. I have quite a bit to catch you up on, from some parasocial anxieties to collaboration with Australia man, the end of being a 3rd year math phd student and starting my 4th year in the grad program has been quite busy. Answering the "what do now" and "what been doing" for this fall takes quite a chunk of time. Th...
There's more to 3B1B's absurd circle division pattern video | Hyperplane Arrangements
Переглядів 15 тис.Рік тому
Here's 3B1B's video about Moser's Circle Problem which you should 100% go watch it: ua-cam.com/video/YtkIWDE36qU/v-deo.html Original Title of this video: "3B1B There's a problem with your absurd circle division pattern video" There's a tiny detail in the statement of Moser's Circle Problem that Grant gives that is a bit off if you think about it too much, and if you decide to address it like I ...
Modifications & Generalizations | Intro to Math Structures VS1.6
Переглядів 601Рік тому
Often times we encounter complicated problems that are more easily understood in a simpler setting or a more general one. This idea can be thought of as modifying or generalizing a given problem and it is a fundamental idea to mathematical thinking. Here I go through a bit of mathematical philosophy around modifications and generalizations, and how thinking about problems through these lenses c...
How do you show that something exists with math? | Intro to Math Structures VS1.5
Переглядів 1,1 тис.Рік тому
How do you show that something exists with math? | Intro to Math Structures VS1.5
"To Infinity and Beyond": What is Transfinite Induction?
Переглядів 2,1 тис.Рік тому
"To Infinity and Beyond": What is Transfinite Induction?
What is Induction and examples of induction proofs | Intro to Math Structures VS1.4
Переглядів 539Рік тому
What is Induction and examples of induction proofs | Intro to Math Structures VS1.4
Partial Derivative of Okamoto's Function With Respect to the Parameter. Examples of Fractal Surfaces
Переглядів 898Рік тому
Partial Derivative of Okamoto's Function With Respect to the Parameter. Examples of Fractal Surfaces
What is proof? (Part 2) | Intro to Math Structures VS1.3
Переглядів 559Рік тому
What is proof? (Part 2) | Intro to Math Structures VS1.3
What is proof? (Part 1) | Intro to Math Structures VS1.3
Переглядів 1,6 тис.Рік тому
What is proof? (Part 1) | Intro to Math Structures VS1.3
Academic Despair | Math PhD Update (Jan 2023)
Переглядів 4,6 тис.Рік тому
Academic Despair | Math PhD Update (Jan 2023)
This video is for me
Переглядів 1,1 тис.Рік тому
This video is for me
What is a set: Basics of sets and quantifiers in math | Intro to Math Structures VS1.2
Переглядів 1,6 тис.Рік тому
What is a set: Basics of sets and quantifiers in math | Intro to Math Structures VS1.2
What are the basics of mathematical logic? | Intro to Math Structures VS1.1
Переглядів 5 тис.Рік тому
What are the basics of mathematical logic? | Intro to Math Structures VS1.1
the calm post quals
Переглядів 2 тис.Рік тому
the calm post quals
I'm done
Переглядів 5 тис.2 роки тому
I'm done
"but like how long are proofs actually?"
Переглядів 2,1 тис.2 роки тому
"but like how long are proofs actually?"
The Generalized Neighborhood Base Construction
Переглядів 2 тис.2 роки тому
The Generalized Neighborhood Base Construction
I feel like I have done nothing for 2 years | math phd update
Переглядів 5 тис.2 роки тому
I feel like I have done nothing for 2 years | math phd update
The Curtis-Hedlund-Lyndon Theorem | Nathan Dalaklis | math academic talks
Переглядів 1,1 тис.2 роки тому
The Curtis-Hedlund-Lyndon Theorem | Nathan Dalaklis | math academic talks

КОМЕНТАРІ

  • @mdaktaruljamanakter-b8l
    @mdaktaruljamanakter-b8l 2 дні тому

    Anderson Lisa Perez Jennifer Rodriguez Frank

  • @rollno5091
    @rollno5091 6 днів тому

    Q: let X=R^3\{O}, the complement of a point O belong to R^3. then X can be partitioned into Euclidean lines. sir kindly make video on this Q

  • @nadyanabahi8259
    @nadyanabahi8259 6 днів тому

    I was literally just working on this problem! Although my main question was what is the expected value of x given some bound on the length and a set of probabilities.

  • @PasserbyP
    @PasserbyP 13 днів тому

    That was wonderful, i was only able to take up to multivariable calculus and second year linear algebra so i was really curious what came after thanks for this video. Looking forward to the post grad version! <3

  • @saynomeows54
    @saynomeows54 14 днів тому

    So I’m guessing ur smart … right?

  • @harinisnaik
    @harinisnaik 18 днів тому

    😅😅😅

  • @bunnyben5607
    @bunnyben5607 21 день тому

    Also known as "the weirdest thing math has come up with, ever".

  • @roronoazoro3204
    @roronoazoro3204 22 дні тому

    I'm here because I'm thinking quit the boring medicine and go to studying the lovely mathematical

  • @yours-truely-sir
    @yours-truely-sir 23 дні тому

    how do I choose what do research? I would really appreciate an answer

  • @newwaveinfantry8362
    @newwaveinfantry8362 25 днів тому

    I took 35 and I actually wanted to take more: Proofwriting Single variable calc Linear algebra Discrete math (graph theory + combinatorics) Python Mathematical modelling Multivariable calc Group theory Real analysis Probability theory Mathematical modelling of dynamical systems Fourier analysis Numerical methods Ring theory Statistics Mathematical modelling of stochastic systems Complex analysis Dynamical systems Topology Geometry (bits of Euclidean, projective, hyperbollic and algebraic) Measure theory Number theory Computer assisted proofs (for algebraic geometry) Galois theory Ethics History of science Functional analysis PDEs Differential topology Differential geometry Biomedical mathematics Representation theory Module + category theory Set theory Automata + complexity theory

  • @bpark10001
    @bpark10001 Місяць тому

    You ought to see what doing this on binary numbers does! You do it the same way, pairing digits up. For the doubling, that simplifies to appending 0 to the right end. For the multiply & test, there is only 1 test: a 1 digit. You append 1 to right of the doubling. You multiply by 1 (don't need to do as it is the same number), do the subtract, discard if too large & append 0 to answer, else append 1 & keep the subtract. So for the test, you take answer (so far) & append "0 1" to the right of it, subtract, append either 0 or 1 to the answer, etc. A few iterations of square root of 2 illustrated. 1 . 0 1 1 √10.00 00 00 00 01 < first subtraction 1 00 < remainder, bring down next 2 digits 1 01 < this is answer with 01 appended, too large, discard difference, next answer digit 0 1 00 00 < unchanged remainder, bring down next 2 digits 10 01 < answer with 01 appended, not too large, next answer digit 1 01 11 00 < remainder subtracted from, bring down next pair 1 01 01 < answer with 01 appended, not too large, next answer digit 1 etc.

  • @glendon1973
    @glendon1973 Місяць тому

    Why do so many really smart people talk so ludicrously with their hands?

  • @pyepye-io4vu
    @pyepye-io4vu Місяць тому

    You can go even higher abstract! Integration on a locally compact topological group with a left-invariant Haar measure! (Abstract Harmonic Analysis)

  • @ireshas.rathnayaka1308
    @ireshas.rathnayaka1308 Місяць тому

    My strong mathematics background (Bsc mathematics special degree , University of Ruhuna in Sri Lanka). I am a mathematics teacher. I am iteresting maths jobs then go to abroad or online. Help please.

  • @montyhall-vs3ul
    @montyhall-vs3ul Місяць тому

    seems that there is a much clearer way to explain the maths visualization of the sqrt long division algorithm but thank you for this vid, and your interest in the subject

  • @thecritiquer9407
    @thecritiquer9407 Місяць тому

    ❤❤❤

  • @jaafars.mahdawi6911
    @jaafars.mahdawi6911 2 місяці тому

    Just one thought (before even finishing the video): Man you never fail to prove yourself (at least to my humble mathive self) as legendary as 3B1B and Numberphile here on YT. i remember i once embarked on a lonely journey to find out why this works, and sure got many lovely insights along the way; that's why i personally see how elegantly you nailed it. Well done.

  • @abyadahmedayan6881
    @abyadahmedayan6881 2 місяці тому

    Hey there, do you have programming in a maths degree. Like C++ or Rust? Anyways, amazing content, subscribing

  • @sh0werheadwireless122
    @sh0werheadwireless122 2 місяці тому

    In korean, 'cee bar' means f-words lol

  • @archangecamilien1879
    @archangecamilien1879 2 місяці тому

    The square of the formula for the sum of integers, I think, lol, but that's memory...[n(n+1)/2]^2, etc...

  • @SagarSharma-kg4mp
    @SagarSharma-kg4mp 2 місяці тому

    please never stop making videos, youre great <3

  • @stanleygomes3555
    @stanleygomes3555 2 місяці тому

    Can you give me resources for learning coding that you have shown in this video?

  • @thesanctuaryleaker8941
    @thesanctuaryleaker8941 2 місяці тому

    Did you have to re-ask professors to submit rec letters?

  • @mrl9418
    @mrl9418 2 місяці тому

    Bravo Chalk! This was very interesting

  • @Necrozene
    @Necrozene 2 місяці тому

    First I learned about the Xorn monster in Dungeons and Dragons. Now I learn about the proper Zorn. Which is scarier?

  • @yoyo42
    @yoyo42 2 місяці тому

    Put the light 45 degree in front of your hand , should remove de shadows ...

  • @davidwright8432
    @davidwright8432 2 місяці тому

    That set had three elements, representing the integers 0, 1, 2. So 'second' (2 as an ordinal) is the third element in the set. If I understand it right.

  • @LieHopf
    @LieHopf 2 місяці тому

    I recently did this problem in Silverman's abstract algebra book. It definitely makes you consider how induction applies.

  • @NikolajKuntner
    @NikolajKuntner 2 місяці тому

    That's quite the surreal timing achievement, at the exact 5 minute mark. (PS: As an Österreicher (Austrian), my heart bleeds when an ö is pronounced as if it were an o.)

  • @abrahammasaryk
    @abrahammasaryk 2 місяці тому

    Doesn't Mendlebrodt define a fractal explicitly as a set where Dh>Dt?

  • @mooglg8663
    @mooglg8663 3 місяці тому

    Showing the correspondence that way was incredibly enlightening and shows exactly why there's that "flipping" when chaining the automorphism groups. This is awesome! Thanks!

  • @IOSALive
    @IOSALive 3 місяці тому

    CHALK, You're the best! I just had to subscribe!

  • @norahalhunayshil1762
    @norahalhunayshil1762 3 місяці тому

    The shadow is noisy