Vertex cover Puns

Is there a known algorithm that can be used to compute the minimum vertex cover if we are given a bipartite graph? I need it for some my summer project. If there is then I would request you to link it. Also if possible, if a python code exists that codes that algorithm I would request you to link that as well.

So I'm studying computer engineering, right now on a class called "Programming techniques", and we also have these three topics. My professor sucks, what are the best resources to study them from?

Hi,

I'm just about to start my research where we have to create an algorithm to identify the MVC within the complement of graphs. What are the difference between MVC complement and MIS if there's any? I just want to know so I know I'm in the right path :) Thank you.

I have a directed graph and want to remove the minimum number of vertices to create a disconnected set of nodes. A node can only be removed if it has an incoming edge.

Is there an algo for solving this problem?

Hey Guys,
I've been trying my luck to find the algorithm for vertex cover problem for a Graph.
I searched on the internet and most of the solutions are related to a tree (eg: Link) and not a graph (which can contain a cycle).
I want to design a recursive dynamic programming algorithm to find the minimum vertex cover for a given graph.
My though process till now:
Consider a graph having cycle, with input given as edges of the graph.

1. Pick an edge from the input array, choose any vertex from the two vertexes of an edge
   Base case: If the vertex is already visited, return 0.
2. Else recursively call the vertex adjacent to current vertex and add 1 to it.

I'm not able to proceed ahead on how to perform memoization and and how to build a dynamic programming algorithm from here.

Can someone please point me in the right direction. I apologize if I'm missing any details in my question.

So, I'm learning complexity theory and algorithm analysis. And I'm trying to figure out how to make an algorithm to reduce k vertex cover to SAT(or kSAT) in an CNF formula. Right now, I'm stuck at the codification. Can anyoane explain how to do this or help me with some rules that should be applied?

If we sort the vertices in non-ascending order of their degree and then select them one by one while removing all corresponding edges, wouldn't it give the minimum vertex cover?

Edit: non-ascending order of the degree

I am trying to solve the minimum vertex cover problem using DQN based on this paper. I have looked at the codes. and trying to implement my own code. I am unable to understand why the following issue is occurring.

i) I have set the reward to -1 and when done = true (i.e the episode has been completed and all the vertices are covered) the reward is 0 similar to the paper. The issue is that my DQN agent keeps choosing the same nodes every time, trying to increase the negative reward. So if I have a 100 node graph, it will say select 20 nodes initially, but as epsilon decreases, it will start repeating the same 20 nodes (or a subset of it) multiple times and my reward start decreasing from -20,-24,-36........-203,-204. Why is the agent trying to increase the negative reward or decrease the reward.

ii) Also, in code for this paper the state is defined as a n dimensional vector (where n=number of nodes), and every time a action (nodes) is selected, the value at that index is set to 1. e.g if it is 5 node graph than the state is 5 dim vector [0 0 0 0 0] and if the action (vertex) is 4 the state becomes [0 0 0 0 1]. Is this an appropriate state representation?

And I also want to implement Hindsight experience Relay to deal with the sparse reward issue. So, what would my goal state look like.

I am sorry for the lengthy doubt, but I appreciate any input!

Hi,

I have the problem VERTEX-COVER which I need to reduce to a system of linear inequalities.

For a graph G VERTEX-COVER(G,k)=1 if there are k vertices {v1, v2, ..., vk} such that for all edges xy: x or y or both belong to {v1, v2, ..., vk}.

I considered doing the reduction through Independant Set -> 3-SAT -> LIN-INEQ, but was told I should do it straight from VERTEX-COVER. I suspect that I can do it by using an adjacency matrix or similar matrix representation of the graph, but I don't know what to put as the constants that the inequalities should be smaller than.

https://youtu.be/ZCVAGb1ee8A

Looking for more complex versions of this to use for a riddle in a game. Thanks for the help!

During research I stumbled upon a generalization of the vertex cover problem. This is the problem which I call “n vertex cover:”

> Given a directed graph G, find a minimal subset of vertices S such that each trail of length n has at least one vertex in S.

Has this problem been researched before? Is there an algorithm to approximate S?

I am also interested in variants where we consider paths or walks instead of trails.

Two semesters ago (at the end of my second year in college) I designed an algorithm for finding an approximate solution to the minimum vertex cover problem and thought I should get some feedback from people more experienced in computer science than I am. I believe it runs in O(N^2 log N) time complexity, if I am not mistaken. There are things about the algorithm that I am not entirely satisfied with (like some use of randomness), but it is based on a simple idea that I think has potential -- I wouldn't be surprised if others used a similar approach, though I were not able to find papers mentioning it.

More information is available in the PDF and source. I would appreciate feedback as I had never really designed an algorithm before nor before written a computer science paper.

I'm assuming so since a problem is np-complete if all problems in np is reducible to it, and we know that vertex cover is np-complete and set cover is np.

But im having trouble transforming a set cover index to vertex cover instance so now im not so sure

Vertex is meeting with clinicians this week to discuss setting up patient support and there will likely be delays with getting enough stock into Canada, but we're a step closer.

Get your baseline eye exams and bloodwork done in advance.

Also double check with your insurance provider that they are covering F508del and any other mutation, and not just the ones that were in the clinical trials. And keep pressuring your MPP's to add the modulators to their provincial formularies so that everyone who needs access has access.

Long story short, our insurance lapsed due to being between job positions and somehow the specialty pharmacy (Alliance) still ran the medication through the insurance (BCBS).

We received a $25,000 bill from the insurance/pharmacy. Anyone have any ideas for how to get some help with this? Obviously, we can’t pay this.

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"In the bloodiest of times and darkest of hour, brother slew brother. Herod of the Old Smoke killed his battle brother Sam Broken by Guilt. Not out of hate or revenge for the pain and abuse during their Saga in the Suds. It was a mercy to a man so driven by good intentions he tried to carry the weight of their Creator's sin. So with a Spike of Smoke so quick it appeared he felled his friend and brought him peace as no one else could." -Forgotten Seer of Taco's Refuge Hesstalian Colony, as recorded by u/Tacolord007 Hesstlan Historian of the Tide of Ages

"Little more can be said of the Madness of Sam-UL the Screaming Lord of Heaven. Great tomes telling of his descent and defeat. The libraries have been filled."

"No, I wish to hear tales of Herod the Man." - Scholar u/MilesKalashnikov, in his introduction chapter of "From Ones and Zeroes He Became Flesh: A Tome of Musing", Tukna'rn Press

"And the Mortal Son of the Mad Matriarch has finally set asides the fears of childhood and done what must be done. No longer a puppet but a truly real boy, the final meeting of Pinocchio and Howdy Doody is a sad ordeal indeed. May he be embraced in the Digital Father's love as Herod has accepted his mother's will, may Screaming Sam-UL Master of the Pubvian Lazarus know rest." - Prayer in the days following the War For Heaven

Herod stared down at Sam-UL, watching as one by one the telltales on the back of the therapy frame's neck went yellow, amber, red. He lifted his right arm, opened his hand, and the blade dropped back into his sleeve, locking into the spring loaded sheathe.

It took effort to roll Sam-UL over onto his back. Effort to cross his hands over his chest. Herod closed Sam-UL's eyes and touched his forehead briefly, closing his own eyes and muttering a quick prayer.

Herod had to admit he'd never been a religious being, viewing the worship of the Digital Omnimessiah to be desperation of humanity pushed to the brink by the Terran/Mantid War.

Now he knew better.

"And Lo, did your Sisyphean task end, my friend," Herod said softly.

He moved over to the chair and sat back down, digging in the other waist pocket of his denim jacket and pulling out another can.

Greetings everyone and welcome to another Shadowverse Rotation Meta report. Where we take a general look at the state of the ladder meta using a variety of sources of .. mild reliability. Just a week after a set of balance changes.. Will there be more to come ? Probably.

In the distance. The screams of Grimnir as he gets nerfed for the second time can be heard across all of the lands

Forestcraft

In the great woods of Forestcraft, where the winding paths stretch forever under the mighty canopies. We find a meeting hastily assembled to discuss the Noise hazard that is Piercye and her well.. ear piercing scream. All the leaders are quick to agree that she can only scream outside of the forests.. and only during day time, just to be sure.

For Forestcraft Sekka Forest continues to be the gold standard of the class, followed by Ladica Forest and Evolve Forest.

Forestcraft has only benefitted from the nerfs as Evo Shadow was a major issue for the deck, this has allowed the class to flourish more, especially at tournaments where it is definitely a lot more popular than on ladder. In large part due to being a generally skill intensive class. Though it is heavily carried by Sekka Forest, so if something were to happen there, the class could be in trouble.

Sekka Forest

Like a thousand tiny arrows

A midrange/combo deck built around Sekka and Fairies. A potent deck that sees a lot more play at competitive events than on ladder where its higher skill requirements makes it less popular. Overall a strong deck with multiple ways to win a fight. Some decks are including a few copies of Piercye for board control and extra board damage plus free evolves. Meaning even if you don't draw Aria early on, you can still activate her.

Ladica Forest

A stoic defender of the woods

A combo deck built around Ladica. A deck that very much only sees play at tournaments and no real ladde

I am not the OP. u/Laser_Lens_4 is the OP from r/blind.

Original

[Rant] Math makes me resent sighted people

I don't like doing these, but I need to talk about my frustrations with people who actually get it. Maybe some good can come out of it. Maybe some blind math wiz will laugh and tell me I've done everything wrong and send me to a website that let's me do this all with perfect accessibility. so here goes.

I'm one week away from completing a remedial math course in community college here in the states. I'm tired, stressed, angry, and want it to end... oh, and I'm insane enough to pursue a computer science degree, so I've got years of math ahead. Let me tell you a bit about my math story as a blind woman.

I was terrible at math in grade school. In retrospect, it was probably because I spent so much effort on squinting at all the weird symbols that I had no time left to actually learn the content. Now that I'm in college and using a sight-free workflow, I'm actually getting it. The most surreal event so far is learning logarithms and understanding it easily whilst vividly remembering sitting in high school and being thoroughly confused.

So where's the rant? Well, the entire past 16 weeks have been an exercise in misery. So, I walk into class, introduce myself to the instructor, and listen to him talk about math for an hour and a half. I go home to try homework online. What do I find? Not LaTeX, not MathML, but some proprietary code on Cengage's website. It's not too bad at first, but mind you absolutely nobody showed me how to use this website, so the first week consisted of me aimlessly navigating by headings and form fields. Then we hit exponents and quadratics. NVDA straight up didn't read superscripts. Thus begins my first email chain bitching at disability workers and web devs. They tell me to use Firefox and Math Player with NVDA, so that means I have to switch browsers, install software, and count my lucky stars that I know how to use NVDA since they provided no instruction for that. Fine, right? Nope. I have to switch the math renderer on the website to MathML, oh and they had to create a duplicate course where everything had been made accessible. So you know, separate but equal... just like the 60's! But wait, there's more. I couldn't switch the renderer myself. I had to have a sighted

Do your worst!

This list is created for people who:

• Do Banshee bounties daily and want to have every weapon for bounty in hand
• Want to use their favorite exotic more often, while not compromising on everything else
• Want to make searching for match game weapons easier
• Are in the Vault500™ club and want to leave for a simpler life
• Need some legendary shards real quick, but don't have them
• Want to masterwork, but don't know what's worth it
• Maximize damage on elemental burns for optimal speedruns
• Are doing preparations for WQ

This list is mostly just to clean up your vault. And to ease up your mind to make the choice what you really need and what you never use, because there are better options. This is a list of every legendary non-sunset weapon that performs well in all PvE. There are a lot of different options, so I included everything worth your while. I am not listing all of the good perks that come on the weapons, because the post would be 3 times longer. If you want to know what the best perks are, there are a lot of videos on YT covering these weapons and their god rolls. But I will write down some desirable perks, that you should be looking for on every weapon class.

NOTE: I will also indicate if the weapon isn't the best, but can still perform good if you don't have the best option as honorable mention. There are some weapons that come only as an event weapon or are hard to get because of the source or are just unobtainable. As "hard to obtain" are weapons hard to get a good roll to a "casual" solo player. This includes Trials, Iron Banner, raid, dungeon, world, playlist and event weapons. This also includes weapons from the dreaming city, as they cannot be target farmed. And there are also weapons that just aren't currently obtainable (Summoner), or had their perk pools changed so they don't have as good perks as they used to have, as some really good weapons are still really good.

• "()" - Honorable mention, not ideal weapon or possible perks
• "*" - Hard to obtain weapon or the target perk combo on said weapon
• "**" - weapon or good perk combo on said weapon no longer obtainable (weapon not available or new perk pool)

Edit: Thanks for all the support so far. As I expected there are some great weapons that I have forgot and left out. I considered the master content capability a little too much and left out some generally great options. Most notably in kinetic slot, where almost half of primaries live. I originally tried to make list sho

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂

Hey Guys,
I've been trying my luck to find the algorithm for vertex cover problem for a Graph.
I searched on the internet and most of the solutions are related to a tree (eg: Link) and not a graph (which can contain a cycle).
I want to design a recursive dynamic programming algorithm to find the minimum vertex cover for a given graph.
My though process till now:
Consider a graph having cycle, with input given as edges of the graph.

1. Pick an edge from the input array, choose any vertex from the two vertexes of an edge
   Base case: If the vertex is already visited, return 0.

2. Else recursively call the vertex adjacent to current vertex and add 1 to it.

I'm not able to proceed ahead on how to perform memoization and and how to build a dynamic programming algorithm from here.

Can someone please point me in the right direction. I apologize if I'm missing any details in my question.