Proof by contradiction - PowerPoint PPT Presentation


Evolution of Mathematical Theories and Proof Systems

Development of mathematical theories such as model theory, proof theory, set theory, recursion theory, and computational complexity is discussed, starting from historical perspectives with Dedekind and Peano to Godel's theorems, recursion theory's golden age in the 1930s, and advancements in proof t

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Understanding Burden of Proof in Removal Proceedings

This material provides an overview of challenging removability issues, burden of proof on removal charges, and key aspects related to Notice to Appear (NTA) and factual allegations in immigration cases. It discusses who holds the burden of proof in different scenarios, such as arriving aliens and th

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Understanding Body Language: A Comprehensive Guide

Body language is a form of nonverbal communication that involves physical behaviors to convey information. This includes facial expressions, body posture, gestures, eye movement, touch, and use of space. Understanding and interpreting body language involves analyzing aspects like eye contact, facial

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Understanding Irony, Paradox, and Oxymoron in Figure of Speech

Exploring the concepts of irony, paradox, and oxymoron through examples and exercises in a lesson designed for 5th-grade students. Students learn to identify these figures of speech that show contrast and contradiction, enhancing their understanding of language and expression. The lesson provides ex

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Understanding Indirect Proofs: Contradiction and Contraposition Examples

Indirect proofs offer a roundabout approach to proving statements, with argument by contradiction and argument by contraposition being the main techniques. Argument by contradiction involves supposing the statement is false and deriving a contradiction, while argument by contraposition relies on the

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Applications and Equivalences in Propositional Logic

This lecture explores applications of propositional logic, including translating sentences, system specifications, logic puzzles, and logic circuits. It also defines tautology, contradiction, and contingency as types of compound propositions, along with logical equivalences. Examples and illustratio

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RESOLUTION METHOD IN AI

Resolution method in AI is an inference rule used in propositional and first-order predicate logic to prove sentence satisfiability. It employs a proof by refutation technique to achieve contradiction, ultimately concluding the original goal's truth. The process involves converting statements to cla

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Blockchain Without Waste: Proof-of-Stake

A study on Proof-of-Stake (PoS) as an alternative to Proof-of-Work (PoW) in blockchain technology. PoS aims to create a sustainable permissionless blockchain by selecting a stakeholder to authorize transactions without the heavy energy consumption of PoW. The paper provides a formal economic model o

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Understanding Gale-Shapley Algorithm for Stable Matchings

Exploring the Gale-Shapley Algorithm, this content dives into the process of generating stable matchings, analyzing efficiency, and proving its correctness through claims. Concepts such as perfect matching, blocking pairs, and proof by contradiction are elucidated to showcase the algorithm's reliabi

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Proof of Stake: Energy-Efficient Alternative to Proof of Work

Proof of Stake (PoS) is presented as an energy-efficient replacement for Proof of Work (PoW) in blockchain protocols. PoS allows meaningful participation based on stakeholders' coin ownership, proportional to their stake. The process of finding nonces in PoW is replaced by owning coins in PoS to par

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Exploring Proof Complexity: The Basics, Achievements, and Challenges

Delve into the intricacies of proof complexity, covering propositional, algebraic, and semi-algebraic proof systems, lower bound methods, and algorithmic implications. Discover fundamental connections to complexity theory and open problems in the field.

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Mathematical Proof Methods and Divisibility Rules

In this lesson, we explore various methods of proof in mathematics, including direct proof, contrapositive, proof by contradiction, and proof by cases. We delve into basic definitions of even and odd numbers and learn about proving implications. Additionally, the concept of divisibility, prime numbe

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Understanding the Halting Problem and Uncomputable Programs

The Halting Problem in computer science presents a practical uncomputable problem where determining whether a program will halt or run forever is impossible. This concept is explored through a proof by contradiction and a tricky program called Diagonal.java. The program showcases the challenges of p

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Insights into Logic and Proof: A Historical Journey

Delve into the historical timeline of logic and proof, from ancient Egyptian mathematical activities to modern advancements in computational proof assistants. Discover the evolution of symbolic logic and the development of proof systems like natural deduction. Explore the significance of logical exp

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Understanding Students' Epistemology on Proof in Mathematics Education

Explore the role of proof in mathematics education, focusing on how mathematicians and students approach and understand proofs. Delve into the challenges undergraduates face in justifying claims deductively and the historical shifts in investigating proof in education.

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Understanding Logical Inference: Resolution in First-Order Logic

Resolution in logic is a crucial inference procedure that is both sound and complete for unrestricted First-Order Logic. It involves deriving resolvent sentences from clauses in conjunctive normal form by applying unification and substitution. This approach covers various cases such as Modus Ponens,

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Understanding Proof by Contradiction in Discrete Math

Explore the concept of proof by contradiction in discrete math through examples and templates. Learn how to derive contradictions to establish the truth of theorems, with demonstrations on topics like integers being both even and odd. Discover the power of contradictions in challenging assumptions a

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Breakdown: Linear-time and Field-agnostic SNARKs for R1CS

Breakdown discusses linear-time and field-agnostic SNARKs for R1CS, focusing on achieving fast prover speeds and supporting circuits over arbitrary finite fields. SNARKs offer efficient proof systems with sub-linear proof sizes and verification costs. The work aims to eliminate the need for FFT-frie

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Reflections on Mother's Words and Inner Journeys

The poetry reflects on the way the persona echoes their mother's phrases silently and the contradictory emotions felt during a journey away from home. The imagery of trains, broad vowels, and contradiction symbolize anxiety, nostalgia, and the transition to a new life. The exploration of new possibi

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Efficient Interactive Proof Systems Overview

This document discusses various aspects of efficient interactive proof systems, including doubly efficient IPs, simple doubly efficient IPs, and the Sum-Check Protocol. It explains concepts such as completeness, soundness, and strategies for verifiers and provers. The content covers examples like NP

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Exploring Architecture and Challenges of Proof Assistants

Explore the architecture of proof assistants, discussing the use of tactics, formal proofs, and the difficulty in utilizing these tools. Discover the contribution of a new architecture for proof assistants, addressing extensibility and error checking, with a focus on soundness guarantees. Delve into

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Understanding Proof of Stake in Blockchain Technology

This lecture delves into the concept of Proof of Stake (PoS) as an energy-efficient alternative to Proof of Work (PoW) in blockchain protocols. It explores how PoS allows meaningful participation based on the stake individuals hold, replacing the need for energy-intensive mining. The lecture discuss

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Evolution of Proof Systems in Mathematics: From Euclid to Godel

Exploring the journey of proof systems in mathematics from Euclid's era to Godel's incompleteness theorem, highlighting the challenges and evolution in understanding truth, halting problems, and the impact on number theory. The concept of designing a proof system that proves everything and the impli

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Introduction to Analysis Methods of Proof

This content introduces various methods of proof in analysis, including direct proof, counterexamples, and indirect proofs like contrapositive. It covers common notations, sets, symbols, implications, theorems, and examples with analyses. The goal is to understand how to prove or disprove theorems u

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Understanding Probabilistic Proof Systems in Complexity Theory

Explore the world of probabilistic proof systems in complexity theory through the works of Oded Goldreich from the Weizmann Institute of Science. Dive into concepts like NP-proof systems, interactive proof systems, completeness, soundness, and efficient verification procedures with a focus on applic

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Understanding Propositional Proof Complexity and Lower Bounds

Studies focus on the intractability of propositional proof complexity, exploring the power of proof systems to verify tautologies. Discussion on known lower bounds and challenges in proving hardness of certain tautologies.

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Methods of Proof in Mathematics

Understanding methods of proof in mathematics involves providing convincing arguments to show the truth of propositions. This involves logical deduction, implications, and establishing new facts from known ones. Different techniques like direct proof and specific logical rules such as modus ponens a

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Understanding Exhaustive Proofs and Proof by Cases in Discrete Math

Exhaustive proofs and proofs by cases are essential methods in discrete mathematics for proving theorems. Exhaustive proofs involve checking all possibilities, while proof by cases focuses on considering different scenarios separately. The methods are illustrated through examples like proving (n+1)^

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Discrete Mathematics: Proof by Cases Example

Exploring a proof by cases example in discrete mathematics, focusing on a theorem stating that among any 6 people, there are either 3 who all know each other or 3 who don't know each other. The explanation breaks down the proof step by step, demonstrating case analysis and subcases to logically show

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Strategy-Proof Voting: Approximations and Possibilities

Explore the concept of approximately strategy-proof voting through models and constructions, aiming to prevent manipulation while ensuring fair outcomes. Discuss the challenges and potential methods to circumvent manipulations based on Gibbard-Satterthwaite theorems. Delve into defining approximatio

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Understanding and Checking Mathematical Proofs

Reading and understanding mathematical proofs involves careful analysis of logic and reasoning. Mathematicians and students use various strategies to ensure correctness, such as examining assumptions, following step-by-step logic, and verifying conclusions. This process is crucial for grasping the v

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Perspectives on Justification and Proof in Mathematics Education Research

This presentation explores diverse perspectives on proof in mathematics education, highlighting the role of proof in K-12 classrooms and discussing students' challenges with proof. It delves into research perspectives on what constitutes a proof, the goals of mathematics educators, and the link betw

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Mastering IGCSEFM Proof Techniques

Dive into the world of algebraic and geometric proofs with this comprehensive guide on IGCSEFM proof techniques by Dr. J. Frost. Explore various proof examples and test your understanding with challenging questions to enhance your skills in proving mathematical statements.

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Genealogical Proof Arguments and SAR Standard of Proof

This detailed content covers the definitions and components of genealogical proof arguments, proof summaries, and the SAR standard of proof. It explains the importance of evidence quality, source citations, and analysis in establishing acceptable genealogical conclusions for SAR membership applicati

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Understanding Proof Techniques in Number Theory

Explore methods of proof, such as direct proof and proof by contradiction, to establish properties in number theory. Learn about even and odd integers, the method of direct proof, writing proofs effectively, common mistakes to avoid, and types of mathematical statements like theorems, propositions,

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Steps to File a Proof of Claim in Bankruptcy Proceedings

Learn how to file a proof of claim in bankruptcy cases under different chapters such as Chapter 7, 13, and 11. Understand the types of bankruptcy, timing for filing a proof of claim, and how to prepare the claim accurately. Essential information for legal professionals and individuals involved in ba

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Exploring Matrix Identities in Strong Proof Systems

This study delves into the complexity of matrix identities as potential challenges for robust proof systems. Through new algebraic techniques, the research aims to propose and analyze non-commutative polynomial identities over matrices, shedding light on lower bounds and conjectures for strong arith

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Proof Coring Works for Micropiles: A Technical Briefing by SS Liew Foundtest Drilling Sdn Bhd

Proof coring is a common method to assess concrete/grout quality in cast-in-situ pile shafts or jet-grouted soil. This technical briefing by SS Liew Foundtest Drilling Sdn Bhd covers the methodology, equipment used, and technical issues related to proof coring for micropiles. The process involves dr

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Understanding Proof by Contradiction in Mathematics

Proof by contradiction is a powerful technique used in mathematics to establish the validity of a statement by assuming its negation leads to a contradiction. This method involves supposing the opposite of what needs to be proven and demonstrating that this assumption inevitably results in an incons

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Understanding Burden of Proof and Standards of Evidence in Legal Proceedings

In legal proceedings, the burden of proof determines which party must prove their case to the trier of fact. The standard of proof refers to the level of certainty required to establish proof, with higher stakes demanding a higher standard. Decision-makers must apply clear and convincing evidence st

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