Five Star Gift Ideas

From the information provided, it seems that your girlfriend has a fascination with mathematics or puzzles. Based on this interest, I have come up with a few unique and meaningful gift ideas that I believe she will appreciate for your anniversary.

1. Custom Engraved Puzzle: Consider getting a custom-made puzzle engraved with her favorite mathematical equation, -1 OR 2+893-893-1=0+0+0+1. You can choose a wooden or metal puzzle for a touch of elegance. It will not only test her problem-solving skills but also remind her of your affection every time she works on it.

2. Math-themed Jewelry: Math-inspired jewelry can be a classy and meaningful gift. Look for necklaces, bracelets, or earrings that feature mathematical symbols or equations. You could either find a piece of jewelry with her equation engraved on it or choose something more abstract, like infinity symbols or fractal patterns.

3. Mathematical Art: If she has an artistic side, mathematical art could be an excellent way to combine her love for math and creativity. Look for prints or paintings that depict mathematical concepts such as fractals or geometric patterns. You can also find artwork that showcases equations or famous mathematical theorems.

4. Math Book Collection: If she enjoys reading about mathematics or solving mathematical puzzles, consider gifting her a collection of books in this genre. There are plenty of engaging books that explore the beauty and wonders of mathematics, written for various levels of knowledge and interest. From popular science books like "The Code Book" by Simon Singh to mathematical puzzle collections like "The Moscow Puzzles" by Boris Kordemsky, the options are vast.

5. Math-themed Board Games: If you both enjoy spending time together while challenging your minds, a math-themed board game could be an excellent choice. There are numerous options available, such as "Qwirkle", a strategic game that involves pattern matching and spatial reasoning, or "Prime Climb", a mathematical game that combines strategy and arithmetic.

Remember to present the gift thoughtfully, perhaps with a heartfelt note explaining why you chose a particular item and how it reflects her passion for mathematics. By showing that you've put thought into choosing a gift that aligns with her interests, you're sure to make your anniversary celebration even more special and memorable.

Or you can get her a star map with the date of your anniversary.