PRIMA

PRIMA is a package for solving general nonlinear optimization problems without using derivatives. It provides the reference implementation of Powell's methods.

[PRIMA @LibPrima]

https://t.co/EJCnHJpXBv

My team has been honored with the "Award for Applications of Operations Research" by the Operations Research Society of China (ORSC), for our contributions to the industry through the development of derivative-free optimization solvers.

[PRIMA @LibPrima]

choco install llvm --version=21.1.8 provides flang 20.1.6 on Windows arm and none on Windows x86_64

https://t.co/FOFWXbkKTP

[PRIMA @LibPrima]

IEEE 754 binary interchange floating-point formats versus `iso_fortran_env` real kinds

https://t.co/IvjQfHR8Ny

[ZHANG Zaikun @zaikunzhang]

A piece of code that causes LLVM Flang to generate NaN/Inf randomly

https://t.co/DA8FAOT1J2

[ZHANG Zaikun @zaikunzhang]

In 1966, Lander and Parkin published a paper containing exactly two sentences. They reported that they had used a program that used direct search on a CDC 6600 to obtain one counterexample to Euler’s Sum Of Powers Conjecture.

See https://t.co/NX7h3MUNgx

https://t.co/lOdM1UReSI

[PRIMA @LibPrima]

An issue with `parfor` in MATLAB R2023a--R2025a https://t.co/YkDbqWuuqy

[PRIMA @LibPrima]

https://t.co/w5lZQ6BwXy

[PRIMA @LibPrima]

MATLAB R2025a on GitHub Actions: Some base dependencies are not installed by setup-matlab, leading to crashes during run-command

https://t.co/JT8y25fKhy

[PRIMA @LibPrima]

Fortran: Implementating a parametrized objective function without using module variables or internal subroutines https://t.co/HTuaypSy93

[PRIMA @LibPrima]

Thread-safe implementation of a parametrized objective function without using internal subroutines

https://t.co/iAmswnlgaQ

[PRIMA @LibPrima]

This is on the front page of Hacker News right now.
@lfortranorg @OndrejCertik

https://t.co/c0WTtBH0us

[LFortran @lfortranorg]

LFortran compiles Prima

https://t.co/146f5siwPE

[PRIMA @LibPrima]

@lfortranorg @llvmorg

https://t.co/t0MctkMtTq

[PRIMA @LibPrima]

I've just contributed to @lfortranorg. Consider supporting them too — every little helps! https://t.co/0Hn84vOUwF via
@opencollect

[LFortran @lfortranorg]

LFortran compiles Prima

https://t.co/146f5siwPE

[ZHANG Zaikun @zaikunzhang]

AMA Colloquium by Professor Katya Scheinberg, Georgia Tech.: Stochastic Oracles and Where to Find Them

Date:                       20/11/2024 Wed.
Time:                       3-4pm (HK Time)
Venue:                     Y306, PolyU

[PRIMA @LibPrima]

You are cordially invited to the CAS AMSS-PolyU JLab of Applied Mathematics Workshop on "Variational Analysis and Nonsmooth Optimization" on 2 - 4 December 2024 (Monday - Wednesday).

Website: https://t.co/1hoyQSQCWW

[PRIMA @LibPrima]

`pdflatex` in TeX Live 2024 stops compiling SIAM article template after `tlmgr update --self && tlmgr update --all` on 8 Nov. 2024 https://t.co/k7cWOqSZjK

[ZHANG Zaikun @zaikunzhang]

https://t.co/PYhji8FjKe

My team has been honored with the "Award for Applications of Operations Research" by the Operations Research Society of China (ORSC), for our contributions to the industry through the development of derivative-free optimization solvers.

[ZHANG Zaikun @zaikunzhang]

See https://t.co/rROta8EWXV and https://t.co/icPtnYcwP8

[ZHANG Zaikun @zaikunzhang]

Online seminar by Professor Nick Trefethen, Harvard University.

THE AAA ALGORITHM FOR RATIONAL APPROXIMATION

5 July 2024 (Friday), 04:00 pm – 05:00 pm (HK Time)

Host: Dr. Zaikun ZHANG, Hong Kong PolyU

Zoom ID: 825 3771 4666

Password: 0705

Zoom Link: https://t.co/oAuvXhQQN1

[ZHANG Zaikun @zaikunzhang]

COBYQA (https://t.co/icPtnYcwP8) is included in SciPy 1.14.0 as a release highlight (https://t.co/Ioe1VUxhZI). It is by Tom M. Ragonneau @TomRagonneau and Zaikun Zhang @zaikunzhang at Hong Kong PolyU and introduced in Ch. 5--7 of Ragonneau's thesis supervised by Zhang and Chen.