koku's life journal

Thursday 2026-02-26

2026-02-26T17:43:21Z

NPRG031 (Programming 2) [lecture] - objects in c#.. virtual methods and the VMT (virtual method table).. i learned something new and that is properties, as i'm used to java which doesn't have them, essentially it's a built in way of making getters and setters for private/protected data of an object

NMAI054 (Mathematical analysis 1) [lecture] - neighbourhood and limits of a series and also properties of series, idk what else to add i'm sorry

NPRG031 (Prgramming 2) [tutorial] - more train sort, next week we'll start typing code, this time we even had a yard that had big O of less than nlogn, i forget which it was though.. also a different one that utilized quicksort

koku daily message:
today's horoscope...
quick

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Thursday 2026-02-19

2026-02-19T17:53:25Z

NPRG031 (Programming 2) [lecture] - c#, not too dissimilar from the lecture for NSWI170 from yesterday, just with c# instead of c++, i've found out how .dlls happen and about the LI, which is analogous to the java virtual machine.. also how to pass a variable as a reference instead of a value to a function

NMAI054 (Mathematical analysis 1) [lecture] - we haven't begun calculus just yet, just did things about infinite sets of numbers, like the natural, integers, rationals, reals and complexes (complices?), proof that rationals and below are countable infinities, and proof that the reals form an uncountable infinity, attributes of subsets of the reals, like minimum/maximum, infimum/supremum and similar

NPRG031 (Prgramming 2) [tutorial] - no programming just yet, as we don't really know much about the syntax of c#, so we had an exercise in what the teacher called train sort.. we were given a series of marshalling yard shapes and we had to decide whether it could be used to sort any arbitrary array of n trains, essentially trying to prove whether a combination of LIFOs, FIFOs and connections between them could be used to permute any word of length n, so more to do with permutations than sorting, also we among other things used an approximation of n! to prove that if you have any constant amount of stacks where you can only move in to the first stack, from the nth stack to the (n+1)th stack, and from the last stack out, you cannot sort a sufficiently large amount of trains gosh i have a lot to say

koku daily message:
even a computer scientist is a mathematician

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Thursday 2025-11-06

2025-11-10T14:09:09Z

NPRG062 (Introduction to algorithms) [tutorial] - went over what we did on the lectures, mostly focusing on the data structures of lifo fifo and the linked list, i also realised on my own that if you go through a list using the stack over and over you can leave with any permutation you want because you can a transposition by taking right after every put except for the first of the two you want to swap and after the second one you want to swap you take two.. and you can reach any permutation using a series of transpositions

NPRG030 (Programming 1) [tutorial] - reading from a file and making graphs using matplotlib! homework is to parse a csv of the weather in prague since 1775 and make some graphs of it

NJAZ070 (English for Upper-Intermediate Students I) - test.. i did all of it except for forgetting a synonym for compliment s/o.. i hope i did well though.. also went over homework about imperatives in maths (prove, define, take etc.) after that we started the next chapter of the book

koku daily message:
all the change begins with us

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Wednesday 2025-11-05

2025-11-10T13:56:08Z

NTVY014 (Physical education I) [swimming] - swimming with flippers! just backstroke though, it was a little fun although the top of my left foot hurt a bit after

NMAI057 (Linear algebra 1) [lecture] - finished skew fields with fields based on modular arithmetic and started vector spaces, including funky things like a vector space of systems of sets with the function of symmetrical difference

NMAI057 (Linear algebra 1) [tutorial] - continued on with permutations, one person decided to go do a problem on the board in front of the class and he was so bad at it it made the teacher rather mad.. it made me feel really bad but on the good side i comprehended all of what we went over!

koku daily message:
can't rain all the time

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Monday 2025-11-03

2025-11-04T13:18:50Z

no NMAI069 today because i was at the psychiatrist in the morning and when i arrived i didn't want to show up for just the end of the class

NDMI002 (Discrete mathematics) [lecture] - problem of a cloakroom attendant which in other words is the probability of a permutation to have no anchors (elements that permute onto oneself).. as the amount of things permuted nears infinity the probability approaches e^-1, with that we ended combinatorics and started with probability we had an example of a disease test with a specific probability of not working out that lead to the introduction of bayes' theorem

NDMI002 (Discrete mathematics) [tutorial] - had a quiz which i failed... after the quiz we had some examples of using the inclusion exclusion principle including counting the amount of surjective functions from and to a finite set!

koku daily message:
that's the way, positivity is the best!

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Wednesday 2025-10-29

2025-10-30T19:23:02Z

no class on tuesday due to the state holiday

NTVY014 (Physical education I) [swimming] - breaststroke arms and breathing.. i struggle with breathing on time.. usually end up breathing in some water

NMAI057 (Linear algebra 1) [lecture] - symmetrical groups and attributes of permutations like the sign and amount of inversions and the inversion of the permutation (2 different things!!) then we started skew fields, nice stuff

NMAI057 (Linear algebra 1) [tutorial] - there was a quiz again, i think i demolished and left only one piece of rubble (there was an equation of matrices and the solution only worked on matrices that commute so i wrote out all the possibilities when they commute but forgot about the inverse, after the quiz we inverted some matrices and did some things regarding attributes of permutations

koku daily message:
thank you for observing the rules of the quiet zone

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Monday 2025-10-20

2025-10-23T13:16:09Z

alright, i've put off writing blog posts for a bit, but i'm back!! gonna write all of monday to thursday right now on the train

NMAI069 (Mathematical skills) - had a quiz on propositional logic, was simple, after that we went over something or other..

NDMI002 (Discrete mathematics) [lecture] - finished binary relations with the theorem "about the long and broad" proving that the product of the width and the length of a partially ordered is greater than or equal to the its size, then we started with combinatorial counting, permutation is bijection of X -> X, then something about power sets

NDMI002 (Discrete mathematics) [tutorial] - a quiz, i felt rather confident with my solutions, but then the teacher wrote the best solution and they were much more elegant than mine.. after we did some exercises on functions and equivalence relations and didn't have time to get to the partially ordered sets

koku daily message:
time is fuel

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