denotational

12 ms·

31.
by denotational 2y ago
Seconded, the “least upper bound” method for constructing the reals that I know about is… …Dedekind cuts.
32.
by denotational 2y ago
Mario Carneiro’s MS Thesis has a good overview of the type theory and how it compares to Coq: https://github.com/digama0/lean-type-theory/releases/downloa...
33.
Tai Mo Shan to Pay $123MM for Misleading Investors About Stability of Terra(sec.gov)
3 points by denotational 2y ago|0 comments
34.
Bounding Data Races in Space and Time [pdf](kcsrk.info)
1 points by denotational 2y ago|0 comments
35.
by denotational 2y ago
> Now, let's say you split the function in two parts and you find their minimums independently. Optimal substructure tells us that if you just merge these two, you'll get the minimum version of the whole function. Optimal subst
36.
by denotational 2y ago
The definition of optimal substructure in the article isn’t quite right. A problem can have optimal substructure even if merging two optimal solutions to two sub-problems that compose to form the complete problem does not provide an optimal
37.
by denotational 2y ago
> The Intel Xeon is not a less exotic example of a DMA controller. The full context is: > The DMA controller is just used as an “memcpy() hardware accelerator”. And this is not a joke. Sometimes those blocks are used in microcontroll
38.
by denotational 2y ago
HN has a “resubmit” mechanism whereby the mods can resubmit interesting posts if they think they might stimulate more interest by being posted at a different time (or just by having better luck). To avoid a dupe, this mechanism post-dates t
39.
by denotational 2y ago
I’m not sure that’s accurate: ASML don’t make masks (i.e. the patterns), they make the EUV photolithography machines that are used in conjunction with the masks. The physical masks themselves are usually made by Hoya, and the technology to
40.
by denotational 2y ago
I just finished reading this last night at 01:30; what a book!
41.
by denotational 2y ago
Ok, you had me for the first three sentences.
42.
by denotational 2y ago
Cadaver allografts (for dental bone implants) can transfer HIV.
43.
by denotational 2y ago
Missed my favourite one: differences in the memory consistency model. If you’re using stdatomic and the like correctly , then the library and compiler writers have your back, but if you aren’t (e.g. using relaxed ordering when acquire&#x2F
44.
by denotational 2y ago
This is a (relatively) recent addition to tmux, I remember this being an annoyance a while ago, and you can find the discussion on GitHub if you search.
45.
by denotational 2y ago
I’m curious: where does the overhead of try/catch come from in a “zero-overhead” implementation? Is it just that it forces the stack to be “sufficiently unwindable” in a way that might make it hard to apply optimisations that significa
46.
by denotational 2y ago
The warning only appears if you run `python setup.py test` (or equivalent), but the breakage occurs regardless of whether you were actually running this; if you depend on a package that doesn’t have a pre-built wheel, and the package attemp
47.
by denotational 2y ago
Particularly sad that even projects that attempt to pin their dependencies are running into this issue: if a dependency doesn’t have a pre-built wheel, then it will be built in an “isolated” environment, which means it won’t inherit a pinne
48.
by denotational 2y ago
I think you might be describing a (photosynthetic) moth!
49.
by denotational 2y ago
> I'm not very happy with the computational content of LEM > Ex-falso has trivial computational content, and we use it all the time: it's `panic!()`. I have major issues with the computational content of a bottom type; my in
50.
by denotational 2y ago
In classical logic, LEM is valid. If you’re going to quibble over whether LEM is justifiable in this case, then you need to justify why you’re only concerned about LEM; why not drop ex falso too (Kolmogorov had serious issues with this ax
51.
by denotational 2y ago
> IPIs (inter-processor interrupts) are inherently and hugely expensive I’d be interested to hear more about this.
52.
by denotational 2y ago
> So, your professors did you injustice by using an inappropriate book. Not necessarily: undergraduate and pre-undergraduate education differs a lot between the UK and the US.
53.
by denotational 2y ago
Looks like this was picked out of the resubmit queue: I originally posted this before the other post, not much to talk about now!
54.
by denotational 2y ago
https://archive.ph/5SwVs
55.
Raspberry Pi prepares for London listing(ft.com)
81 points by denotational 2y ago|29 comments
56.
by denotational 2y ago
The glass transition temperature of amorphous ice is approximately 140 K.
57.
Ask HN: Avoiding print-on-demand textbooks/technical volumes
4 points by denotational 2y ago|1 comments
58.
by denotational 2y ago
Once you get away from the “rack” as the unit and go back to a tower/NUC, I don’t think Oxide has anything special to add, but I may be wrong since I haven’t used their product. A Dell (using them as an example since I’m familiar with
59.
by denotational 2y ago
Interesting, I’m curious what you have in mind: what concrete product would Framework be selling (1/2/4U server? Laptop? NUC? Tower?), and how does the involvement of Oxide distinguish the product? > It would be great to see th
60.
by denotational 2y ago
> Two people owning identical flats, one with a 90% mortgage at 5%, one with no mortgage at all, will charge exactly the same rent. Identical flats in the same building will have the same management charge. Flats in different buildings a

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