Math researcher (AI/ML). Dynamical systems, kernels, Optimal Transport, quantum information theory. Prev: Principlal ML/AI @ Riot Games (League of Legends).

Joined May 2009
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Oleksii Kachaiev 🇺🇦 retweeted
I want to save time for those who are new to this conversation — the problem is not that Ukraine has to “give up” something to Russia “for peace.” The problem is that no matter what Ukraine “gives up” now — be it Crimea, or Donbas, or Kherson, or Zaporizhia, or Odesa, or Kharkiv or anything — it will not give any sort of “peace” and will only strengthen Russia in its goal of defeating and eradicating Ukraine as a nation and incorporating its territory into its empire. The rest is just idle talk.
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I've spent so many years of my life in this very building… hundreds of my memories lead me right back here, to this very alley 💔
Sumy. A terrorist strike by russia against a peaceful Ukrainian city. This morning, russia launched a ballistic missile attack on the center of Sumy. Civilians were killed and injured. Sincere condolences to the families of those who became victims of this strike. It happened on Palm Sunday, as people were on their way to church. The strike on civilians was deliberate and insidious. This was no accident — it was terror. The world must respond. Ukrainian lives depend on the determination of our allies. We urgently need additional air defense. At the same time, work must continue on real and effective security guarantees for Ukraine and our citizens. Strong, united actions can stop the russian aggressor.
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RT @ZelenskyyUa: A Russian missile struck an ordinary city, directly hitting a street in an area with residential buildings. Preliminary re…
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Oleksii Kachaiev 🇺🇦 retweeted
This is what Russia does to Ukraine on a daily basis. This is Kryvyi Rih just tonight, Zelensky's hometown. A Russian Iskander missile, a cluster load, fired just into the middle of a densely populated residential area, next to a playground for kids. At least 14 killed, as of now, including at least 6 kids. Lots of pictures of mutilated dead bodies... people burned alive in a car. This is what Russia does every single day to Ukraine.
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The transformation of the US into russia has been successfully completed. Would you like to discover what’s new?
Leavitt: “If this story proves anything, it proves that Democrats and their propagandists in the mainstream media know how to fabricate, orchestrate, and disseminate a misinformation campaign quite well. And there’s arguably no one in the media who loves manufacturing and pushing hoaxes more than Jeffrey Goldberg.”
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A few more hints to a new reality.
Greene: “What country are you from?” Reporter: “The UK.” Greene: “We don’t give a crap about your opinion…why don’t you go back to your country.“ Marge Greene is a fucking embarrassment to our country.
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Keep going, shall we?
Q: “In terms of the Signal chat controversy…is the DOJ involved at this point?” Bondi: “…We're not going to comment any further on that. If you want to talk about classified information, talk about what was at Hillary Clinton's home that she was trying to BleachBit.”
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Oleksii Kachaiev 🇺🇦 retweeted
We shall endure this as well
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“He doesn’t represent all of us.” He does. You gave him power. His choices will change millions of lives, yours too. Like it or not, that’s how it works. Pass it on. “In four years, it’ll be back to normal.” It won’t. Nothing will be back. That’s just your ignorance talking.
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Words matter. Say "Ukraine’s war", and you ask Ukraine to end it. Say "russia’s invasion", and you know what must be done. Do you?
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They (trump’s admin) don’t care if you believe Ukraine invaded russia. That’s not the point. It’s just a loyalty test. The real lie is simpler: “Ukraine is about to lose”. They need you to believe it exactly because it’s not (not even close). To kill hope and determination.
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The performance was (obviously) staged. Yet the truth remains: Ukraine stands *unbroken*. We will not bow - to russia, to the US, to anyone. Zelenskyy stood firm. The country stood firm. History will record the shame of those who abandoned truth. We made our choice. So did they.
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Oleksii Kachaiev 🇺🇦 retweeted
Disgracefully rude behavior from JD Vance, and I can't believe that the Vice President of the United States is acting this way in the Oval Office of the White House in Washington, D.C. What is the point of this forced antagonism and this contrived arrogance toward the leader of a country that is fighting for its survival and freedom—a country that is friendly to America? Zelensky came as a friend and speaks with respect to America as a friend and partner.
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Watching thousands of MAGA accounts frantically delete tweets calling Zelenskyy a dictator would be amusing — if it weren’t so bleak. Ministry of Truth? Warping reality on command is the essence of fascism. Seeing people obey and rationalize it without question is even darker.
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The nation’s right to self-determination is not granted by Trump, nor can it be revoked by him. It is inherent. The arrogance of Americans who believe otherwise is staggering. Ukraine will fight on, regardless of the illusions others entertain.
Trump says that Ukraine will have to sign the mineral deal "For a right to fight on". What a ridiculous statement to make, Ukraine will fight on regardless of your administration.
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Oleksii Kachaiev 🇺🇦 retweeted
It should be astonishing, though it’s not, that the American negotiators want to begin from the premise that Russia was right and that Ukraine is not sovereign. Accepting the lies of the aggressor isn’t just unethical, it’s also unstrategic. Agreeing with Russia that a war of aggression leads to the end of Ukrainian sovereignty is not just morally but factually wrong — it is a complete misreading of what happened these last three years, as Ukrainians won crucial battles, took back territory, and proved their existence by any conceivable metric. Any peace will have to begin from legal and political reality. For America at this point in the war to -help- Russia undo Ukrainian sovereignty is not just injustice but a provocation to a much broader war.
US Special Envoy to the Middle East Steve Witkoff referred to the early 2022 Istanbul protocols as offering "guideposts" for negotiations between Russia and Ukraine. An agreement based on those protocols would be a capitulation document. ⬇️ The Istanbul protocols emerged from Russia-Ukraine negotiations in March and April 2022 as Ukraine was still reeling from the initial Russian invasion and do not reflect the situation today. The draft agreement included the following key provisions that would destroy Ukraine's ability to defend itself and prohibit any state from helping Ukraine do so: ▪️ Ukraine would have had to amend its constitution to remove the clause committing Ukraine to NATO membership, add Ukraine’s commitment to permanent neutrality; and make Russian an official language of Ukraine. ▪️ The Ukrainian Armed Forces were to be capped at 85,000 and restricted to 342 tanks, 519 artillery pieces, and missiles with ranges under 40 kilometers. ▪️ The provision to Ukraine of any foreign weapons including missiles of any type, armed forces, and formations was to be banned. ▪️ The US, the UK, China, France, and Russia were to guarantee Ukraine’s neutrality, but all parties were to have to agree on a response to any violation, giving Russia a veto over any action. ▪️ The guarantors were to commit to ending permanently all bilateral security agreements with Ukraine including those regarding the provision of military aid. These demands, which Vladimir Putin has often reiterated, amount to complete Ukrainian capitulation, not a sustainable peace in the interests of the US or Europe, to say nothing of Ukraine. Witkoff also stated that “deals only work… when they’re good for all the parties… that’s the pathway we’re on here.” Istanbul cannot be the basis for any such agreement.
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Oleksii Kachaiev 🇺🇦 retweeted
Three years of resistance. Three years of gratitude. Three years of absolute heroism of Ukrainians. I am proud of Ukraine! I thank everyone who defends and supports it. Everyone who works for Ukraine. And may the memory of all those who gave their lives for our state and people be eternal. 🇺🇦🇺🇦🇺🇦 #SupportUkraine
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Trump: Sign the deal immediately and get nothing, or you gonna get nothing at all!!! Zelenskyy: I’m not signing anything. Trump: *confused* Trump: *confused and angry* (c) Art of the Deal
⚡ Zelenskyy on the minerals agreements draft with the US: "We should not recognize grants as debts." "I want a dialog with President Trump. I do not want to sign something that the next 10 generations of Ukrainians will have to repay."
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Oleksii Kachaiev 🇺🇦 retweeted
Surprisingly, there’s still a place of honor, firm principles, mutual respect, moral standards, and decency in the dirt pit of world politics, and it’s Ukraine.
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looming 2026. russia is falling. the order arrives without explanation. trump’s troops are deployed against Ukraine. their purpose unclear and destination uncertain. at home, the newspapers insist they are defending America itself. no one remembers who wrote the headlines. or why
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