Formal languages | Lemmas

Ogden's lemma

In the theory of formal languages, Ogden's lemma (named after ) is a generalization of the pumping lemma for context-free languages. (Wikipedia).

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Evaluate the expression of a term of a geometric sequence

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplying/div

From playlist Sequences

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Given a geometric sequence determine the nth rule

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplying/div

From playlist Sequences

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Given two terms find the nth term of a geometric sequence

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplying/div

From playlist Sequences

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Write the nth term rule for a geometric sequence

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplying/div

From playlist Sequences

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Evaluate for the nth term of a sequence given the ratio and first term in a geometric

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplying/div

From playlist Sequences

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Using sigma sum notation to evaluate the partial sum

👉 Learn how to find the partial sum of an arithmetic series. A series is the sum of the terms of a sequence. An arithmetic series is the sum of the terms of an arithmetic sequence. The formula for the sum of n terms of an arithmetic sequence is given by Sn = n/2 [2a + (n - 1)d], where a is

From playlist Series

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How to determine the rule for a geometric sequence given two values

👉 Learn how to write the explicit formula for a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multi

From playlist Sequences

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Given the first term and the ratio find the nth term of a geometric sequence

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplying/div

From playlist Sequences

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Learn how to determine the nth term of a geometric sequence

👉 Learn how to find the nth term of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplying/div

From playlist Sequences

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100 COOL THINGS IN PYTHON (PART 1) - CS50 on Twitch, EP. 14

Join CS50's head course assistant, Veronica Nutting, for a tour of some of Python's cool features (with an eventual goal of reaching 100 over several parts!), from data structures to analyzing presidential data. Co-hosted by Colton Ogden. Join us live at twitch.tv/cs50tv and be a part of

From playlist CS50 on Twitch

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FLASK BASICS (SERVER-SIDE PYTHON) - CS50 on Twitch, EP. 31

Join CS50's Kareem Zidane for a tour of Flask, a Python microframework for developing web applications. With a lighter learning curve than similar technologies like Django, Flask makes for an excellent introduction to server-side programming. In this stream, we discuss routing, sessions, d

From playlist CS50 on Twitch

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JAVASCRIPT DRAWING APP FROM SCRATCH - CS50 on Twitch, EP. 11

Join CS50's head of production, Dan Coffey, for a look at an app you may have seen in 2018's lectures: draw50. Acting as David's digital blackboard application, draw50 makes use of the Paper.js and hammer.js libraries to deliver vector-based drawing commands with multitouch and networking

From playlist CS50 on Twitch

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INTRO TO R AND BIOSTATS - CS50 on Twitch, EP. 19

Join CS50's Andy Chen for a look at biostatistics in R and R Studio, where we dive into the NHANES (National Health and Nutrition Examination Survey) data set for a real-world use case. Co-hosted by Colton Ogden. Join us live each week on twitch.tv/cs50tv and become a part of the live cha

From playlist CS50 on Twitch

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LINUX COMMANDS TUTORIAL - CS50 on Twitch, EP. 13

Join CS50's Nick Wong for a tour of the command prompt in this tutorial centered around Linux commands (with compatibility toward other operating systems, such as Mac OS X, as well). In addition, we explore some other topics related to cybersecurity, programming, and more. Co-hosted by Co

From playlist CS50 on Twitch

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GENERATING PDFS WITH PYTHON - CS50 on Twitch, EP. 29

Join CS50's David J. Malan for a look at render50, CS50's internal tool (also publicly available) used to generate nicely formatted PDFs from source code files. Most modern text editors don't include an easy print feature, but for academia and even our own reference for things like streams

From playlist CS50 on Twitch

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REGULAR EXPRESSIONS TUTORIAL - CS50 on Twitch, EP. 15

Join CS50's David J. Malan for a tour of regular expressions--pattern-matching tools that can make identifying and verifying emails, phone numbers, passwords, and so much more all the easier; in this particular stream, we'll explore them in the context of re, Python's module that itself is

From playlist CS50 on Twitch

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GAME OF FIFTEEN IN PYTHON FROM SCRATCH - CS50 on Twitch, EP. 28

Join CS50's Rodrigo Daboin Sanchez for a look at Game of Fifteen, also known as 15 Puzzle, implemented from scratch in Python. A former CS50 problem set, Game of Fifteen is essentially a sliding-board puzzle with one solvable solution, in which the numbers 1 through 15 are sorted from top

From playlist CS50 on Twitch

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LOW-LEVEL C TUTORIAL - CS50 on Twitch, EP. 21

Join CS50's Nick Wong for a look at C for lower-level usage than we typically cover in the course, touching on such topics as system calls, strace, and more! Co-hosted by Colton Ogden. Join us live on Twitch at twitch.tv/cs50tv and be a part of the live chat! This is CS50 on Twitch.

From playlist CS50 on Twitch

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Write the first five terms of the geometric sequence

👉 Learn how to find the first 5 terms of a geometric sequence. A sequence is a list of numbers/values exhibiting a defined pattern. A number/value in a sequence is called a term of the sequence. A geometric sequence is a sequence in which each term of the sequence is obtained by multiplyin

From playlist Sequences

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HTML BASICS - CS50 on Twitch, EP. 26

Join CS50's Colton Ogden and Tom Ballatore for the beginning of an epic journey into web development. In this stream, we examine the very foundation of web programming with HTML, the "skeleton" of the web, which underlies the structure of all web pages, even this one! Tune in live on twit

From playlist CS50 on Twitch

Related pages

Pumping lemma for context-free languages | Formal language | Ambiguous grammar