AbstrakDalam paper ini, diturunkan persamaan geodesik null dalam ruang waktu Kerr-Einstein empat dimensi dengan menggunakan prinsip bahwa setiap simetri dalam metrik berkaitan dengan vektor Killing. Dari persamaan geodesik null diperoleh sudut pembelokan cahaya di sekitar lubang hitam berotasi dengan menggunakan integral numerik. Berdasarkan hasil perhitungan numerik diperoleh bahwa untuk parameter dampak yang kecil maka sudut pembelokan cahaya sangat bergantung pada momentum sudut lubang hitam.Kata Kunci: pembelokan cahaya, ruang waktu Kerr-Einstein, lubang hitam

This article discusses the function of literature in shaping human character. The values mandated in literary works, especially folklore have a strategic role in shaping and perfecting behavior. They are very useful in guiding people's attitudes and mindsets as literary readers and lovers, especially folklore from West Sumatra. Humans can use information systems and technology to carry on important values in folklore. But the extent to which progress has been used to pass down the values of the character's formation. It turns out that discussion in that direction has not yet been conducted. There are three folktales from West Sumatra, which are the focus of the analysis in this article. All three are sourced from folklore that is still alive and developing in communities in West Sumatra, namely "Bujang Lenguang Bujang Pemburu", "Rawa Manisan", and "Kuduak Batu Jawi. This study uses functional research methods to dismantle the values of character education that are useful for the development of national character, especially for mental knowledge and the simplicity of young people in West Sumatra. Thought to offer the use of information systems and technological advances were raised based on the crucial function of literary works in shaping the nation's character. Research shows that literature has a role as an aesthetic teaching tool and is veiled. Folklore is a means to convey teachings about the value of politeness for readers or connoisseurs of literature. Literature must play an essential role in shaping the character of the Indonesian nation in the future. Advances in information systems and technology can help in carrying out and carrying out these literary functions.