<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br></div><div> Bill Gropp was extremely influential in the early days of PETSc. I learned numerical analysis from him as an undergraduate and was later his post-doc.</div><div><br></div><div> ICERM is hosting a meeting, <span style="font-family: "Helvetica Neue";">From Modeling to Learning with HPC,</span> Sep 13-14 2025 in honor of Bill Gropp's 70th birthday. You can find more information at <a href="https://urldefense.us/v3/__https://app.icerm.brown.edu/Cube/apply__;!!G_uCfscf7eWS!fumvXSupRQHE-gnpd_eqLI601O9rUP73OmUFZwrAcwjAnWrKE4Uyjf8WJtxTBK3uqboZQKSHaBtg3gZSEcOyy-o$">https://app.icerm.brown.edu/Cube/apply</a></div><div><br></div><div> Barry</div><div><br></div><div><br></div><div><br></div><div><span style="font-size: 16px; white-space: break-spaces; border: 0px; font-family: "gg sans", "Noto Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; margin: 0px; padding: 0px; vertical-align: baseline; outline: 0px; color: oklab(0.952331 0.000419 -0.00126); font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: oklab(0.219499 0.002111 -0.007449); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br></span></div></body></html>