Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: immibis Newsgroups: comp.theory Subject: Re: D correctly simulated by H cannot possibly halt --- templates and infinite sets Date: Thu, 30 May 2024 19:58:12 +0200 Organization: A noiseless patient Spider Lines: 34 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Thu, 30 May 2024 19:58:13 +0200 (CEST) Injection-Info: dont-email.me; posting-host="30d02c23347fd2ece49602eb193f0fc0"; logging-data="1898161"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/7n9Ge0YwQikOFFy7o/ZMm" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:L6Qj+/yyQ8nn9tSaqE02PSt+2sc= Content-Language: en-US In-Reply-To: On 30/05/24 15:11, olcott wrote: > On 5/30/2024 4:11 AM, joes wrote: >> Am Wed, 29 May 2024 22:48:45 -0500 schrieb olcott: >>> *A deciders compute the mapping* >>> FROM ITS INPUTS >>> *to it own accept or reject state* >>> >>> *Deciders cannot take* >>> ACTUAL TURING MACHINES AS INPUTS >>> >>> *Deciders can only take* >>> FINITE STRINGS AS INPUTS >> Poetic. >> What is an „actual Turing machine”? >> > > *Formalizing the Linz Proof structure* > ∃H  ∈ Turing_Machines > ∀x  ∈ Turing_Machine_Descriptions > ∀y  ∈ Finite_Strings > such that H(x,y) = Halts(x,y) > > Every H is an actual Turing_Machine > > Every x is a Turing_Machine_Description > thus not an actual Turing_Machine > > ∃H ∈ Turing_Machines ∀x ∈ Turing_Machines ∀y ∈ Finite_Strings such that H(DescriptionOf(x),y) = Halts(x,y)