Robert L Anderson – författare

Presents an introduction to the classical treatment of Backlund and general surface transformations, and includes detailed and accessible techniques for constructing both groups of tranformations which will be of great value to the scientist and engineer in the analysis of mathematical models of physical phenomena. Classical and recent examples of Backlund transformations as applied to geometry, nonlinear optics, turbulence models, nonlinear waves and quantum mechanics are given. The authors discuss applications of Lie-Backlund transformations in mechanics, quantum mechanics, gas dynamics, hydrodynamics, and relativity.

Dea Donahue has been able to travel through people's dreams since she was six years old. Her mother taught her the three rules of walking: Never interfere. Never be seen. Never walk the same person's dream more than once. Dea has never questioned her mother, not about the rules, not about the clocks or the mirrors, not about moving from place to place to be one step ahead of the unseen monsters that Dea's mother is certain are right behind them. Then a mysterious new boy, Connor, comes to town and Dea finally starts to feel normal. As Connor breaks down the walls that she's had up for so long, he gets closer to learning her secret. For the first time she wonders if that's so bad. But when Dea breaks the rules, the boundary between worlds begins to deteriorate. How can she know what's real and what's not?

Dea Donahue has been able to travel through people's dreams since she was six years old. Her mother taught her the three rules of walking: Never interfere. Never be seen. Never walk the same person's dream more than once. Dea has never questioned her mother, not about the rules, not about the clocks or the mirrors, not about moving from place to place to be one step ahead of the unseen monsters that Dea's mother is certain are right behind them. Then a mysterious new boy, Connor, comes to town and Dea finally starts to feel normal. As Connor breaks down the walls that she's had up for so long, he gets closer to learning her secret. For the first time she wonders if that's so bad. But when Dea breaks the rules, the boundary between worlds begins to deteriorate. How can she know what's real and what's not?

"e;An inventive blend of fantasy and mystery, full of nail-biting twists that draw you in and keep you guessing . . . you won't put it down."e; -Andrea Cremer, New York Times-bestselling author A teenage girl learns the shocking truth of her existence in this fantasy novel of memories, first love, and worlds within worlds . . . Seventeen-year-old Dea Donahue has been walking through dreams since she was six. It's a talent she inherited from her mother, who taught her to follow the rules or the monsters will find her. For years, she has crisscrossed the country with her mom who can't seem to settle in one place for too long. That's how Dea finds herself in the small town of Fielding, Indiana, with new kids and the same old rumors that pop up around them and their house with too many clocks and not one mirror. Rules, you know . . . Everything changes when Connor comes to town and they form a nearly instant connection. Wanting to know everything about him, Dea throws out the rules of dream-walking. She enters his unconscious more than once, and worse, Connor catches her doing it. But he's not the only person whose attention she's attracted. Deformed, faceless monsters now know where she is. And when her mother disappears, Dea is left on her own to figure out how to escape the waking nightmare that's about to take over her world. "e;Dreamland seeped into my own dreams and made me question the line between reality and dreamscape. Original and riveting."e; Megan Shepherd, New York Times bestselling author"e;This page-turning thriller is filled with creepy dreamscapes that will entrance and frighten readers."e; School Library Journal