A relation between the inverse elements is found, and a new algorithm for inverting a block tridiagonal matrix is established ...

🚃🦈🤕四海揽月九天腾龙✨84、 wǒ zhī suǒ yǐ huó dào xiàn zài de quán bù yì yì ， shì wèi le cǐ kè néng duì nǐ shuō ， wǒ ài nǐ ， wǒ huì ...