848KiB, 1080x2340, Screenshot_20220407_124006_com.android.gallery3d.jpg View SameGoogleiqdbSauceNAO Anonymous Thu 07 Apr 05:42:24 2022 No.14371250 ViewReplyOriginalReport Quoted By: i dont really quite understand Hamiltonian and Lagranian mechanics. Do you guy have any advice, tips, secret for learn this topic? thx