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Elementary Differential Equations and Boundary Value Problems, International AdaptationElementary Differential Equations and Boundary Value Problems by Boyce is crafted from the perspective of an applied mathematician, catering to interests in differential equations that range from theoretical to intensely practical, often blending both aspects. The book targets undergraduate STEM students enrolled in an introductory differential equations course. Students who engage with this text are expected to have a working knowledge of calculus,
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.5 ★★★★★
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Product Reviews
★★★★★ 5
Great clean sunscreen
Great sunscreen, made of minerals instead of chemicals, holds nice in water when surfacing
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 6, 2025
★★★★★ 5
My go to brand
My go to brand. Other brands I have to reapply constantly and still have sunburn. I love this brand and the stick is even better for applying sunscreen. Very reliable without any mess!
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Reviewed in the United States on February 3, 2025
★★★★★ 1
Not fur Surfing or other Water Sports
I got this in a swag bag from a surfing contest. The stick is very dry...that's the only way I can explain how it feels. It certainly doesn't glide on like other face sticks. After one wave and ducking my face in the water, the product smeared off and ran into my eyes. My vision got blurry from that, and it was really hard to see the waves coming in. I won't be using this product ever again. I also looked at the EWG website, and this product was given a 6. For those new to EWG, that's not a good rating. You want like a 1 or 2.
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Reviewed in the United States on January 10, 2026
★★★★★ 5
Perfect for travel
Nice size and easy to apply. And no burns!
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Reviewed in the United States on September 15, 2024
★★★★★ 3
Too little product for the price
I was surprised at how little product you get for the price. After only two weeks, the bar already broke in half, and there's not much left. Additionally, it leaves white streaks, so you'll need to rub it in after applying. I still like the fact that it's got clean organic ingredients. I won't by the bar again, but I will try the spray
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Reviewed in the United States on June 3, 2024
